The resting membrane capacity is determined mainly by using two factors: the variations in ion concentration of the intracellular and extracellular fluids and. the relative permeabilities of the plasma membrane to one-of-a-kind ion species.
The resting membrane potential of a neuron is set at -70 mV (mV=millivolt) - this means that the inside of the neuron is 70 mV less than the outdoor. At relaxation, there are distinctly more sodium ions outdoor the neuron and extra potassium ions internal to that neuron.
The resting membrane ability of a neuron average -70mV (millivolts). All neural activities start with an alternative within the resting membrane capability of a neuron.
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Auxin moves between cells through a process called polar transport. Auxin molecules move from one cell to the next through pin proteins. However, their movement is unidirectional. What accounts for this unidirectional movement?.
Cell-to-cell (from one cell to another and then to the next) carriers (a type of membrane transport protein) are what move auxin molecules between nearby cells, and the direction of the flow is governed by where the carriers are located on the plasma membrane of the relevant cells.
Transport from one cell to the one next to it is accomplished through a somewhat intricate combination of various sub-processes. The so-called chemiosmotic model was developed to describe the process underlying the distinct nature of auxin transport through living cell files of the plant. Ruberry and Sheldrake first postulated the mechanism in the 1970s, and this prophetic forecast was finally realised in the twenty-first century.
The mechanism below explains how auxin is drawn into cells by the so-called acid trap and how it can only leave them when certain carriers are active. These carriers regulate the directionality of the flow from cells and, more generally, the direction of auxin transport through the entire plant body.
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Which of the following events characterizes metaphase of mitosis?
I. Movement of chromosomes to the equatorial plane (metaphase plate) of the cell.
II. A spindle fiber attaches to each sister chromatid.
III. Separation of sister chromatids that are being pulled to the poles of the cell.
A
I.
B
II.
C
III.
D
I and II.
E
All of these
A.chromosomes aligning themselves at the equator.
What distinguishing features of mitosis' metaphase?A phase of cell division known as "metaphase" (mitosis or meiosis).Individual chromosomes are typically dispersed throughout the cell nucleus.The chromosomes of the cell condense and move toward one another, aligning in the center of the dividing cell, and the nucleus of the cell disintegrates during metaphase.
What distinguishes metaphase from other phases?Its alignment of a duplicated chromosomes at the metaphase plate, an equatorial plate, is what gives metaphase its name.Via microtubules attached to its kinetochore, one of the sister chromatids is joined to one pole of the cell, and the other sister chromatid is associated to the other pole.
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Which element is important in directly triggering contraction? a. sodium (Na') b. calcium (Ca. [tex]{ }^{++}[/tex]) cotassium ( [tex]\left.\mathrm{K}^{\wedge}\right)[/tex] d. chloride (Cl)
Answer:A
Explanation:
TRUE/FALSE. foods grown and livestock raised in accordance with uda regulations on use of synthetic fertilizers, herbicide, pesticides, preservatives and other chemicals.
Foods grown and livestock raised in accordance with USDA regulations on the use of synthetic fertilizers, herbicides, pesticides, preservatives, and other chemicals is a True statement.
Grain and oilseed exports must be weighed and inspected in accordance with USDA regulations, which also set official marketing requirements for these products. The Department's laws also govern the production of meat products and meat slaughter.
Produce can be labeled as organic if it was grown on soil that was untainted for three years previous to harvest. Most synthetic fertilizers and insecticides are among the prohibited chemicals.
The term "organic" on food labels denotes that the food or other agricultural product has been prepared in accordance with USDA organic guidelines. These techniques combine biological, cultural, and mechanical approaches to support resource cycling, ecological balance, and biodiversity preservation.
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What question is not answered in the text? a. When did the woman first disappear? c. Who murdered the missing woman? b. Where was the cat dna analyzed? d. How did the cat hair help convict beamish?.
Beamish was found guilty of second-degree murder and given a 15-year prison term based on the genetic evidence connecting him to the jacket. The case established a legal standard that permits animal DNA fingerprinting to be used as evidence in criminal proceedings.
Skittles the Cat
In Prince Edward Island, Canada, in 1994, the Royal Canadian Mounted Police (RCMP) discovered a woman's remains in a little burial. Shirley Duguay, 32, was the woman who was recognized as her. Duguay, a mother of five, and her common-law partner, Douglas Beamish, split up. At the time of the murder, Beamish had a criminal record and was out on parole. Beamish was the main suspect in the investigation, although the RCMP found no proof linking him to the crime.
The RCMP discovered a leather jacket nearby that was covered in blood that matched Duguay's. Some of Beamish's pals informed the RCMP that they believed Beamish owned a coat like it, but they were unsure. On the interior lining of the jacket, forensic examiners discovered 27 white hairs. At first, they speculated that the hairs might be Beamish's, but microscopic examination revealed that they were actually feline fur.
One of the case's detectives recalled visiting Beamish's parents' home and seeing a white cat there by the name of Snowball. Beamish was residing with his parents at the time of the murder. Having proof that Snowball owned the white fur would connect Beamish to the crime. Even though forensics experts could detect that the hair belonged to a cat, their microscopic hair analysis was insufficiently precise to identify which cat was the owner. Genetic testing was necessary to identify the specific animal that shed the hairs. The forensics detectives working on the case, though, had never used cat DNA fingerprinting before.
The Animal Genetics Group at the Frederick, Maryland-based Laboratory of Genomic Diversity (LGD) was called by an RCMP investigator. They consented to attempt Snowball's DNA fingerprinting. Snowball gave the RCMP a blood sample, and one of the hairs they found on the jacket had a root with enough DNA to do an analysis. Marilyn Menotti-Raymond, the case's lead geneticist, created a technique to search the cat's DNA for short tandem repeats (STR). The DNA from Snowball's blood sample and the hair root were both identical.
Prince Edward Island's physical isolation due to its island status worried the investigators. Consequently, many of the cats on the island may be related. If so, there wouldn't be much of a connection between Snowball's blood sample and the hairs discovered on the jacket. The RCMP gathered cats from all across the island, including the vicinity of the crime scene, to see whether this was a problem. They collected blood samples from these cats and used the Menotti-Raymond-developed STR analysis on them. The high level of genetic diversity among the island's cats suggested the significance of the STR match between Snowball and the hairs discovered on the jacket.
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Which of the following is NOT a result of increased ATP in the pancreatic beta cell?
Group of answer choices
insulin release
vesicle fusion
potassium release
calcium intake
Vesicle fusion is NOT a result of increased ATP in the pancreatic beta cell.
What is ATP?
Cells consume and store energy from adenosine triphosphate (ATP), which is the energy source. An adenine-based nitrogenous base, ribose sugar, and three serially bound phosphate groups make up the nucleoside triphosphate structure of ATP.
When macromolecules like proteins and lipids are moved into and out of the cell, ATP is an essential component of the process. Active transport mechanisms that move these molecules over a concentration gradient are powered by the energy released during ATP hydrolysis.
Therefore, Vesicle fusion is NOT a result of increased ATP in the pancreatic beta cell.
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hippoboscidae have wings that will fall off once they reach their final host. we call these wings.
These are deciduous wings.
The principal characteristic of the fowl's wings is to provide them with the potential to fly. All birds have two wings, however, that does not mean flying.
Each of the wings includes a thin membrane supported by using a system of veins. The membrane is shaped by way of layers of integument carefully apposed, while the veins are fashioned where the 2 layers stay separate; now and again the lower cuticle is thicker and extra heavily sclerotized underneath a vein.
There are 4 preferred wing shapes that are not unusual in birds: Passive soaring, energetic hovering, elliptical wings, and high-speed wings.
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What is the function of glucagon
Glucagon counteracts the actions of insulin by by increasing blood glucose levels.
What is glucagon?Glucagon is a peptide hormone, produced by alpha cells of the pancreas. It increases concentration of glucose and fatty acids in the bloodstream. It is considered to be the main catabolic hormone of the body. It is also used as a medication to treat a number of health conditions.
Insulin is also produced from the pancreas and it's function is to regulate the level of blood glucose in the blood stream. As alpha cell produces glucagon, beta cells produces insulin.
The main function of glucagon is to counter the effect of insulin by stimulating hepatic glucose production which will increase the blood glucose level.
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Label the image of a compound light microscope using the terms provided.
The labeled compound light microscope is attached accordingly. A compound microscope is a microscope that enlarges the picture of a sample by using numerous lenses.
What is a compound light microscope used for?A compound microscope is often used for seeing materials at high magnification (40 - 1000x), which is accomplished by the combined impact of two sets of lenses: the ocular lens (in the eyepiece) and the objective lenses (close to the sample).
The compound light microscope is best for studying complex structures inside cells, leaves, stems, and molds, as well as surface features of a specimen, tissue samples, and cells.
A compound light microscope is simple to use and operate. It is small and hence easy to keep. It is a vital resource in biosciences and medicine. It allows you to observe live specimen samples.
The invention of the Microscope by Lens Crafters around 1590. Every major discipline of research has profited from the use of the microscope, which was invented in the late 16th century by a humble Dutch eyeglass manufacturer named Zacharias Janssen.
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Why are the silkworm and honey bee called useful insect?Write two reason.
Explanation:
Out of those nine phyla, the phylum Arthropoda consists of a large number of insects, among which insects like silkworm and bees are useful insects. The larvae of a silk moth secrete the silk thread which is used to make clothes. Honey bees produce and store honey which is nutritious food.
Answer:
SILKWORM
Silkworms are useful because they produce high quality silk fiber which is used to weave clothes, shawls and expensive clothing .They are strong, long and shiny fibre.They have highly elastic and high tensile strength.
HONEY BEES
We get honey from ThemThey help pollinate flowers after extracting materials from themsome Bee products I.e Beeswax can be use as a moisturizer.Explanation:
pls rate as brainliest
Different stimuli of the two special senses trigger different methods of signaling within their receptors. How are the following stimuli transmitted?.
Different stimuli of the two special senses trigger different methods of signaling within their receptors. They are:
ExteroreceptorsInteroceptorsWhat kind of receptors each unique sense uses?Our sensory receptors may number closer to 18 or 20, according to scientists. Chemoreceptors react to substances through taste, odor, and internal alterations. When the temperature changes, thermoreceptors react. Mechanoreceptors react to pressure, touch, and other physical forces.
The physical cues for taste are soluble chemical molecules found in food and fluids, and various molecules trigger various sensory receptors. When food is put in the mouth, molecules in it dissolve in saliva and come into touch with taste buds, which triggers the first taste sensation.
Hence, Exteroreceptors: They react to inputs from the outside world. Our bodies contain interoceptors, which react to any alterations in the internal environment, such as variations in temperature, blood pH, and so forth.
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Question 1
Which one of the following is true of tRNAs? (Concept 17.4)
a. TRNAs are extremely small molecules.
b. Each tRNA binds a particular amino acid.
c. There are four types of tRNA.
d. tRNAs carry special sequences known as codons.
e. All of the above.
Answer: E
Explanation: I believe the answer is E but you may want to double check my logic. Each tRNA has to bind to a specific amino acid and they themselves are extremely small molecules. The tRNA carries the amino acid that corresponds to each codon, do I'm not exactly sure if that's correct. And finally there are 4 types of RNA, not tRNA, but technically there are at least 4 types of tRNA as there can be up to 20 different types.
The illustration draws an analogy between the way energy drives matter to cycle in an ecosystem and the way water causes a waterwheel to turn. Give an example of another analogy that could be used to show the relationship between energy and the cycles of matter.
The comparison between how energy drives matter to circulate in an ecosystem and how the wind drives a windmill can also be used to illustrate how energy and the cycle of matter are related. The wind powering the windmill causes its blades to spin in a circle. Energy propels matter through the ecosystem in a similar way that wind propels a windmill.
Do materials really move through ecosystems in cycles?Between soil and the air, as well as between organisms as they live and die, matter cycles. The atoms that make up the organisms in an ecosystem alternate between living and nonliving components on a regular basis.
The following sections of this concept focus on four specific biogeochemical cycles: the water, carbon, nitrogen, and phosphorus cycles.
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In an asexual life cycle, cells reproduce by meiosis. fertilization. All of the answer choices are correct. meiosis and fertilization. mitosis.
Answer:
k
Explanation:
Electrical synapses involve coupling of neurons by: ________
Electrical synapses involve coupling of neurons by synaptic clefts.
What are synaptic cleft?
Synaptic cleft is a space between two neurons, connecting them to one another forming a synapse. It is bound on one side by pre-synaptic neuron and. have post-synaptic neuron on the other side. The presynaptic neuron is always an axon terminal.
Moreover, the space between two neurons across which the impulse is transmitted by a neurotransmitter is known as synaptic cleft. The neuron that transmits the signals are known as presynaptic neurons and the neurons that receive the signal are known as postsynaptic neurons.
Therefore the synaptic cleft, also known as the synaptic gap, is the space in between the axon of one neuron and the dendrites of another and is where the electrical signal is translated to a chemical signal that can be perceived by the next neuron.
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Which of the following statements about atherosclerosis is FALSE? It is a progressive process that begins at a young age. O It starts with a fatty streak-an accumulation of lipoproteins. O Heart disease, stroke, and peripheral vascular disease are all due to atherosclerosis O It is an irreversible process.
The statement that is false about atherosclerosis is It starts with a fatty streak-an accumulation of lipoproteins.
What is atherosclerosis ?When we talk about the condition that is called atherosclerosis, we are referring to a disease condition that would cause fats to be built up in the blood vessels of a person. These blood vessels would include the arteries and the veins of the person.
Now we know that the process of the atherosclerosis can not be reversed and it could lead the sufferer to have a stroke or any other kind of heart disease that would be highly detrimental to the person.
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then major contribution of forensic entomology to death inestigations is
In situations forensic entomology where insects have attacked a corpse, the main benefit is to assist in determining the PMI.
For what is forensic entomology most known?The use of species identification, known growth rates, and data on insect succession to pinpoint the site and roughly establish the time of the victim's death is the main focus of entomology study and case application in forensic science.
What three things can an entomologist use forensics to determine?Forensic scientists can determine the postmortem index, any shift in the corpse's posture, and the cause of death by observing the insect population and the growing larval stages.
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Researchers performing __________ insert a weak electric current into the brain to stimulate it. a. lesioning b. esb c. eeg d. pet please select the best answer from the choices provided a b c d
Researchers performing ESB technique insert a weak electric current into the brain to stimulate it.
What does ESB contain in psychology?
Electrical stimulation of the mind (ESB) is a method which includes the creation of a susceptible electric modern into precise places withinside the mind via way of means of the use of more than one microelectrode to use brief pulses of electrical currents supposed to imitate the herbal glide of impulses via the neural pathways.
What contribution do ESBs make to our understanding of the brain?
Electrical brain stimulation (ESB) is useful in a variety of settings, including neurosurgery and experimental research. Neurosurgeons can use this procedure to help doctors determine which brain tissue needs to be removed.
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The discovery of cells and the development of the cell theory would not have been possible without.
If improvements to the microscope had not been made, the discovery of the cell would not have been conceivable. In 1665, scientist Robert Hooke made improvements to the existing compound microscope in an effort to discover more about the microscopic world.
Explain discovery of cell ?
The term "cell" was initially applied to these minute units of life in 1665 by a British scientist by the name of Robert Hooke. Hooke was able to make a significant discovery despite the weak microscopes of his day. He was shocked to observe what appeared to be a honeycomb when he used his microscope to examine a small slice of cork. To depict what he saw, Hooke created the drawing in the picture below. As you can see, the cork was composed of numerous extremely small parts, or what Hooke called cells.
Soon after Robert Hooke found cells in cork, Anton van Leeuwenhoek in Holland used a microscope to make other significant discoveries. Because Leeuwenhoek manufactured all of the lenses for his microscope himself and was so skilled at it, his instrument had greater power than other microscopes of the time. In actuality, Leeuwenhoek's instrument was nearly as powerful as contemporary light microscopes. Leeuwenhoek was the first to see human cells and microbes with a microscope.
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correctly label the following parts of the large intestine.
Answer:
ok
Explanation:
Which of the following are some of the gender differences that research has found in brain structure and activity between the genders?
a. Female brains are approximately 10 percent smaller than male brains.
b. Female brains have more surface brain tissue than males.
c. The area of the parietal lobe that functions in visuospatial skills tends to be larger in males.
Researchers found that Female brains are approximately 10 percent smaller than male brains.
What is the brain?We know that the brain is the organ in the body that is responsible for the coordination of the activities of the body. Hence the brain lies at the center of the coordination of an individual.
There are obvious differences between the way that the brain appears in the male and the female organisms. Humans do not have the same size of the brain in the male and the female but this does not essentially correlate with brain function in both genders.
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Calcium is involved in all of the following functions except:
a. Calcium provides energy for cells.
b. Calcium deposits into bones and teeth to provide a rigid structure.
c. Calcium is necessary for blood clotting.
d. Calcium is necessary for muscle contraction and relaxation.
e. Calcium is necessary for nerve functioning.
Answer:
A. Calcium provides energy for cells
Explanation:
With the process of elimination, we can rule B, C, D, and E because they are all involved with calcium
B: Calcium is crucial for bone and teeth structure (it’s one of the main components of bone and teeth)
C: One role calcium plays in blood clotting is platelet activation
D: Calcium causes contraction by reacting with regulatory proteins in the muscle, which causes muscle contraction/relaxation
E: Calcium is necessary for nerve functioning because it contributes to providing a depolarizing signal and contributes to synaptic activity
Calcium is involved in all of the functions except Calcium provides energy for cells. So, the correct option is (A).
What is the role of Calcium in the body?Calcium is important for the structure of bones and teeth as it is one of the main components of bone and teeth. It plays a role in blood clotting is platelet activation. Calcium causes contraction by reacting with regulatory proteins in muscles, causing muscle contraction/relaxation.
It is essential for nerve functioning as it contributes to providing a depolarizing signal and contributes to synaptic activity. Calcium deficiency can affect all parts of the body resulting in weak nails, slow hair growth, and fragile, thin skin.
It plays an important role in both neurotransmitter release and muscle contraction. So, calcium deficiency can bring about seizures in people.
Thus, Calcium is involved in all of the functions except Calcium provides energy for cells. So, the correct option is (A).
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why do we need to label the membrane
The posterior horns of the spinal cord contain mainly: ________
The posterior horns of the spinal cord contain mainly: sensory nuclei.
The correct answer choice is option b.
What is meant by the posterior horns of the spinal cord?The posterior ends of the spinal cord simply refers to the dorsal end of the spinal cord's grey matter which receives information from various parts of the body. It helps to detect and process information received from other body parts.
So therefore, it can be deduced from the explanation given above that the spinal cord is a fluid filled tissue within the space in the vertebral column.
Complete question:
The posterior horns of the spinal cord contain mainly: ________
a. Sympathetic nuclei
b. Sensory nuclei
c. Automatic motor nuclei
d. None of the above
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Davion is in the clinic for a check up. At birth, you diagnosed him with Treacher-Collins Syndrome, a genetic disorder that affects the development of the bones and other tissues in the face. TCS is believed to be caused by a change in the gene on Chromosome 5, which affects facial development. About 40% of the time, one parent has Treacher Collins Syndrome. If the parents of the affected child are not affected by the syndrome, the chances of a sibling having Treacher Collins are minimal. Which organelle in the cell is responsible for Davion's inheritance of this genetic disease?
According to the research, the correct answer is ribosomes. The organelle in the cell that is responsible for Davion's inheritance of this genetic disease called Treacher-Collins Syndrome is ribosome.
What is Treacher-Collins Syndrome?It is a syndrome considered polyformative when multiple malformations are found, it has an abnormal craniofacial development pattern, and it is caused by a mutation of the chromosome that codes for the protein melasa.
In this sense, the protein melase is involved in ribosomal biogenesis, that is, it is involved in the transcription of the ribosomal DNA gene, as an important component of cell organelles called ribosomes, rRNA is essential for protein assembly.
Therefore, we can conclude that according to the research, Ribosome mutations of the protein melasa have been associated with Treacher Collins syndrome.
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identify the three layers of connective tissue of a spinal nerve, and identify the major peripheral branches of a spinal nerve. (module 12.5a)
The three layers are outer epineurium, middle perineurium, and inner endoneurium; posterior ramus, anterior ramus, and rami communicantes
A connective tissue sheath called the epineurium surrounds each nerve. Each bundle of nerve fibers is called a fasciculus and is surrounded by a layer of connective tissue called the perineurium.The brain and spinal cord are invested by three layers of connective tissues called the meninges that provide protection against traumatic forces. These layers are dura mater, pia mater and arachnoid.There are three layers of meninges around the brain and spinal cord. The outer layer, the dura mater, is tough white fibrous connective tissue. The middle layer of meninges is arachnoid, which resembles a cobweb in appearance, is a thin layer with numerous threadlike strands that attach it to the innermost layer.
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What structural feature does glucose share with larger organic molecules, including dna and proteins?.
Glucose forms the backbone structure with large organic molecules including DNA and proteins.
What is the use of glucose?
Very low blood sugar (hypoglycemia) is treated with glucose, most frequently in persons with diabetes mellitus. The way that glucose works is by rapidly raising the level of glucose in your blood. Another purpose for glucose is to give someone who is unable to eat due to illness, trauma, or another medical condition carbohydrate calories.
The structural structure of nucleic acids, including DNA and RNA, is composed of the sugar-phosphate backbone. This molecule's directionality is determined by this backbone, which is made up of alternating sugar and phosphate groups.
Nucleotides make up DNA and RNA, and they are connected to one another in a chain via chemical interactions between their neighboring nucleotides' phosphate groups and sugar bases, known as ester bonds. Each nucleotide has a sugar at its 3' end and a phosphate at its 5' end. A free hydroxyl group on the 3' carbon of the following nucleotide forms an ester link with the phosphate group connected to the 5' carbon of the sugar on the first nucleotide. produced by two oppositely running linear sugar-phosphate backbones
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Nitrogen has an atomic number of seven. How many electron shells does it likely have?
a. one
b. two
c. three
d. Four
Nitrogen has two electron shells.
What are electron shells?
An atom's outermost region, which surrounds the atomic nucleus, is known as the electron shell. It consists of a collection of atomic orbitals with the same value of the fundamental quantum number, n. One or more electron subshells, also known as sublevels, exist within electron shells.
It is used to explain the distinct area that electrons occupy around an atom's nucleus and is sometimes referred to as an orbital or atomic shell. Because electrons contain energy, electron shells are occasionally referred to as energy levels. The energy of electrons decreases as they get further away from the nucleus.
There are a maximum of two electrons per s subshell. At most 6 electrons can fit in each p subshell. Maximum number of electrons in each d subshell is 10. Maximum number of electrons in a f subshell is 14.
Therefore, Nitrogen has two electron shells.
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Which statement best compares bacteria and fungi?
A. Bacteria and fungi always cause infectious diseases.
B. Bacteria are living organisms, whereas, fungi are not.
C. Both bacteria and fungi rely on living organisms to reproduce and survive.
D. Most bacteria and fungi are harmless and may be beneficial to other living things.
what are male gametes called
Answer: sperm
Explanation:
Male gametes are also called sperm
