Answer:
Apical Meristem undergo rapid cell division ,hence is responsible for growth in height of the plant and is found on the tip of the plant. So, if apical meristem is either damaged or cut, growth can't take place and the plant will stop growing
Explanation:
Apical meristem undergo through rapid cell division, thus it is responsible for growth of height and if the meristem is cut the growth stops.
What is apical meristem?Apical meristem is defined as the region of cells responsible for the division and growth in the root and shoot tips in plants.
Apical meristems are special zones of growth present at the tips of plants and these are responsible for the growth of shoots and roots and shows primary plant body.
The main function of apical meristem is growth of plant and unlike undifferentiated plant cells, differentiated plant cells generally cannot divide and produce different types of cells.
There are mainly two types of apical meristem and these are shoot apical meristem (SAM) and root apical meristem ( RAM).
Therefore,Apical meristem undergo through rapid cell division, thus it is responsible for growth of height and if the meristem is cut the growth stops.
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INTRODUCT
TO BIOLOGI
UNIT 1
UNIT 2
Exercise ?
А.
Encircle the best suitable answers.
i. Ms. Aisha was busy in dissecting and analyzing the heart of frog. Proba
she is a:
a. Cell biologist
b. Taxonomist
C. Histologist
d. Palaeontologist
Answer: C. Histologist
Explanation:
A cell biologist refers to a person who studies cells and their functions and their interactions with the biological organisms.
A taxonomist refers to a biologist who classifies organisms into their categories.
A histologist, can also be called a histotechnician, and this is someone who prepares tissue samples for the pathologist to study. A histologist cut samples from organs which are used for microscopic tissue analysis.
Palaeontologist is a person who studies fossils in order to get information regarding life on Earth.
To control the population of insects, if insecticides are used then how it will affect the population of birds?
Answer: Birds are exposed to insecticides through ingestion by mistaking, they ingest pesticide residues when they trim their feathers with their beaks or may drink or bathe in contaminated water. The effects can range from death due to poisoning to a variety of effects such as weakening of eggshells, deformation and slow growth of chicks, lack of appetite, weight loss, immune system damage, hormonal disruption. In addition, insect-eating birds are at a loss when insecticides cause a drop in the number of insects available, especially when they have chicks to feed.
Explanation:
Insects are a class of invertebrate animals characterized by having one pair of antennae, three pairs of legs and two pairs of wings (which, however, may be reduced or missing). They comprise the most diverse group of animals on Earth with an estimated thirty million undescribed species, potentially representing more than 90% of the life forms on the planet. Moreover, they can be found in almost every environment on the planet, so they are not only highly diverse, but also incredibly abundant.
Like any species on the planet, insects play a vital role in the ecosystem, so that a change in the population can compromise the survival of everything around them. On the other hand, insects called "pests" are those insects observed in systems and whose populations cause damage to crops. Although both beneficial insects and pest insects are part of any ecosystem and are also present in human-managed systems. Humans combat these pests using insecticides, which are chemical compounds used to kill insects. They are usually very specific since the product only affects the organism it damages, leaving the rest of living beings and the environment unharmed. And they have low toxicity to humans and animals.
The most common way in which birds are exposed to insecticides is through ingestion by mistaking, for example, a pesticide granule for a seed, or indirectly, by consuming contaminated prey (insects). Birds may also ingest pesticide residues when they trim their feathers with their beaks or may drink or bathe in contaminated water. It should be noted that it also depends on the toxicity of the chemicals, the magnitude and duration of exposure. The effects can range from death due to poisoning to a variety of effects such as weakening of eggshells, deformation and slow growth of chicks, lack of appetite, weight loss, immune system damage, hormonal disruption. In addition, insect-eating birds are at a loss when insecticides cause a drop in the number of insects available, especially when they have chicks to feed.
Most people need more daily allowances of servings from the what
food group
Answer:
According to the U.S. Department of Agriculture, you should consume the highest proportion of your foods from the grain group. However, you should consume almost as many portions from the vegetable group; fill your plate a little over one-fourth full with grains and add almost the same amount of vegetables.
Explanation:
Compare and contrast the cell structures / organelles found in plant and animal cells
• list 3 organelle / structure plant and animal cells have that are the same
• list 2 organelles / structures plant and animal cells have that are different
Answer:
Explanation:I need to get some answers too
Ajudem-me por favor qual é o intruso nesta 4 alíneas de profissões:
a) cantiga
b) cantor
c) cantadeira
d) cantão
Answer: it is b
Explanation:I DID THIS TEST
Mary determined that 5 pollen grains could fit along the diameter of the field of view of her microscope. If each pollen grain has a diameter of 0.3mm what is the diameter in millimeters of the field of view of Mary's microscope
1.5mm
15mm
4.7mm
5.3mm
Answer:
1.5mm
Explanation:
According to this question, Mary is trying to view 5 pollen grains under her microscope. She found out that the 5 pollen grains each with a diameter of 0.3mm could fit along the diameter of the field of view of her microscope.
This means that the diameter of the field of view of Mary's microscope can be calculated as follows:
Diameter of each pollen × no. of pollen that fit in
= 0.3mm × 5
= 1.5mm
Hence, the diameter of the field of view of Mary's microscope is 1.5mm.
In a microarray analysis used to compare sporulating and nonsporulating yeast, a spot that appears yellow at a given time point is associated with a gene that is _______. View Available Hint(s) In a microarray analysis used to compare sporulating and nonsporulating yeast, a spot that appears yellow at a given time point is associated with a gene that is _______. is expressed roughly equally in both sporulating and nonsporulating yeast likely to play a role in the process of sporulation expressed in neither the sporulating nor the nonsporulating yeast present in sporulating, but not in nonsporulating yeast
Answer:
is expressed roughly equally in both sporulating and nonsporulating yeast
Explanation:
A DNA microarray (also called DNA chip) is a microchip-based testing platform which can be used to analyze and compare gene expression profiles between samples. A DNA microarray contains microscopic DNA spots attached to a solid surface, where each spot corresponds to thousands of copies of a specific DNA sequence (i.e., probes). Subsequently, cDNA 'target' molecules obtained by reverse transcription from RNA are then hybridized to a microarray. This process of hybridization can be quantified by using fluorophore-labeled targets that determine the level of the expressed gene (transcript) in the target sample. In a DNA microarray, the intensity and types of color in each spot indicate the presence and level of each specific transcribed gene in the samples. In consequence, the presence of yellow spots in the DNA microarray indicates approximately equal expression levels of the corresponding gene in both yeast samples.
Select the correct statement about equilibrium.
a) the weight of the endolymph contained within the semicircular canals agains the maculae is responsible for static equilibrium.
b) due to dynamic equilibrium, movement can be perceived if rotation of the body continues at a constant rate
c) cristae respond to angular acceleration and deceleration.
d) hair cells of both types of equilibrium hyper polarize only, resulting in an increased rate of impulse transmission.
Answer:
cc) cristae respond to angular acceleration and deceleration.
Explanation:
The vestibular system is the sensory apparatus of the inner ear that acts to maintain body equilibrium, as well as to coordinate the position of the head and eye movement. The vestibular system consists of five distinct sensory organs: three semicircular canals (i.e., anterior, posterior, and lateral) which are involved in dynamic equilibrium; and the two otoliths (i.e., utricle and saccule), involved in static equilibrium. The crista ampullary (plural: cristae) is the sensory organ located in the semicircular canals of the inner ear of vertebrates, which act to detect angular acceleration and deceleration. The cristae of the semicircular canals respond to the rotational movement and are responsible for dynamic equilibrium.
explain about blackmans law of limiting factors
Answer:
i dont know
Explanation:
because i hane never see that question
Answer:
k
Explanation:
Which type of micro-organism makes its own food, like plants do?
a - algae
b - protozoa
c - bacteria
d - yeast
Answer:
algae. I just looked it up. algae are autotrophs meaning they make their own food. I hope this helps!
Answer:
algae is your answer
Explanation:
hope help yiu
•Science
analysis of disease resulting from nutrient deficiency
Hello user,
The answer is Protein Energy Malnutrition ( PEM )
hope it helps you ...
who discovered that white light is a spectrum of colours rays
Answer:
Isaac Newton
Explanation:
Isaac Newton discovered that white light is a spectrum of seven colour rays.
How is matter converted into energy in the sun’s core?
A. Helium isotopes decay, releasing energy in the process.
B. Hydrogen nuclei collide and fuse, releasing energy in the process.
C. Hydrogen nuclei collide and fuse, consuming energy.
D. Hydrogen nuclei split apart, releasing energy in the process.
However, by comparing the of these organisms, many similarities between them are revealed. These similarities suggest that they're linked. This type of study is called developmental biology.
Complete Question:
1. Organisms don’t all reproduce the same way. However, by comparing the ____ of these organisms, many similarities between them are ____
2. of these organisms, many similarities between them are revealed. These similarities suggest that they’re ___ linked. This type of study is called developmental biology.
Group of answer choices.
A) Cells B) Embryos C) Mode of reproduction D) Evolutionarily. E). Revealed.
Answer:
embryo; revealed; evolutionarily.
Explanation:
Reproduction can be defined as a biological process which typically involves living organisms producing an offspring.
Basically, there are two (2) methods of reproduction and these are;
I. Asexual reproduction: it involves the cloning of a living organism to produce an offspring because there is only a single parent.
II. Sexual reproduction: it involves the combination of the genome (gamete) of a male and female living organism during fertilization.
It's a fact that all living organisms do not reproduce the same way.
However, by comparing the embryo of these organisms, many similarities between them are revealed. These similarities suggest that they’re evolutionarily linked.
Hence, we refer to this type of study as developmental biology
Which hormone can be found in many fruits and can become airborne and cause over-ripening and abscission
Answer:
Ethylene is a plant hormone that is released in the form of gas. It stimulates plant cells degradation making the fruits softer and sweeter. As a result, high ethylene levels may cause fruits over-ripening and abscission.
Explanation:
Name the landscape region that contains the youngest rock material.
How did Mendel control which plants were
being pollinated?
A. He used artificial cross-pollination,
B. He only used female plants in his experiments,
C. He allowed any plant to be pollinated,
Answer:
Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some of the plants in his experiments. Then he pollinated them by hand with pollen from other parent plants of his choice.
Mendel controlled which plants were being pollinated by using artificial cross-pollination. Details about Mendel experiment can be found below.
How did Gregor Mendel control pollination?Gregor Mendel is referred to as the Father or Genetics because of his immense role in inheritance.
Gregor Mendel performed series of experiment using pea plants where he crossed them to observe the inheritance of several traits.
However, Gregor Mendel was able to control the process of self-pollination among the pea plants he used by employing artificial cross pollination.
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it happens it happens when moving objects or travels as a given distance in a shorter amount of time.
A.accelerates
B.moves
C.slows down
D.stops
Answer:
I think option (A) is right answer
What happens if the products of digestion of proteins in a boiled egg are more than what the body needs ?
Answer:
sry I don't know but need more points
Explanation:
I surely answer yr next question
why are personal hygiene and safe health practices important even when you are among people who are apparently healthy?
Answer:
because it helps alot
Explanation:
1.it protect you from sicks and diseases
2. it helps one feel comfortable
As air rises, it transfers heat from the surface of Earth to the upper levels of the atmosphere in a process called
convention is your answer
The lipid bilayer membrane of a neuron is impermeable to charged molecules or ions. To enter or exit the neuron, ions must pass through special proteins called ion channels that span the membrane. Ion channels have different configurations: open, closed, and inactive. Some ion channels need to be activated in order to open and allow ions to pass into or out of the cell. Which ion channels are used in the production of electrical signals (Action Potential) in neurons
Answer:
The correct answer is: in neurons, the most used ion channels in the production of action potentials are the channels that allow fo passage of sodium and potassium.
Explanation:
Neurons must be able to transmit and receive signals in order for the nervous system to operate. Because each neuron has a charged cellular membrane (a voltage differential between the interior and the exterior), the charge of this membrane can vary in response to neurotransmitter molecules generated by other neurons as well as external stimuli. The membrane potential is the difference in total charge between the interior and outside of the cell. This membrane potential exists thanks to the state of ion channels that may or may not allow the passage of certain ions.
A substance called a neurotransmitter allows a neuron to accept input from other neurons. The neuron will transmit the signal to downstream neurons if the input is powerful enough. The opening and shutting of voltage-gated ion channels, which produce a transient reversal of the resting membrane potential to form an action potential, are used to transmit a signal within a neuron (in one direction only, from dendrite to axon terminal). The polarity of an action potential changes across the membrane as it travels down the axon. The signal then activates other neurons once it reaches the axon terminal.
The target neuron is depolarized to its threshold potential (-55 mV) by a stimulation from a sensory cell or another neuron, and Na+ channels in the axon hillock open, initiating an action potential. The neuron totally depolarizes to a membrane potential of around +40 mV after the sodium channels open. As Na+ channels open, the action potential moves along the neuron.
The cell's membrane voltage is "reset" to the resting potential after depolarization is complete. The Na+ channels shut, signaling the start of the refractory phase in the neuron. Voltage-gated K+ channels open at the same moment, allowing K+ to escape the cell. The membrane potential returns to a negative state as K+ ions exit the cell. The cell becomes hyperpolarized when K+ diffuses out of it, resulting in a membrane potential that is lower than the cell's usual resting potential. The sodium channels revert to their resting state at this moment, ready to open again if the membrane potential rises over the threshold potential again.
A sperm fertilized an egg. Which two structures will the fertilized egg contact?
ovary and fallopian tubes
fallopian tubes and uterus
uterus and cervix
cervix and ovary
Answer:
B Edge 2021
Explanation:
I just took the test
When a sperm fertilizes an egg, the fertilized egg, also known as a zygote, will travel from the fallopian tube to the uterus, where it will implant and grow into a fetus. Therefore, the correct option is B.
What is a fertilized egg?A fertilized egg is also known as a zygote. It is a single cell that results from the union of a sperm and an egg during fertilization. Fertilization typically occurs in the fallopian tube of a female reproductive system when a sperm successfully penetrates and merges with the egg.
The egg is released from the ovary and travels through the fallopian tubes towards the uterus. It is in the fallopian tubes where the egg can be fertilized by a sperm, forming a zygote.
The zygote will then continue to travel through the fallopian tube towards the uterus. As it approaches the uterus, the zygote will undergo several cell divisions, forming a ball of cells known as a blastocyst.
The blastocyst will then implant into the lining of the uterus, where it will continue to grow and develop into a fetus. The cervix, which is the lower part of the uterus, plays a role in pregnancy by keeping the fetus inside the uterus during gestation and then opening to allow for delivery during childbirth.
Therefore, option B) the fallopian tubes and uterus is correct.
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which of these is a cash crop
A. cucumbers
b. grass
c. latex
d. strawberries
Answer:
The answer is Cccc Latex
the answer is bbbbb grass
Which type of white blood cell is activated by antigens that are bound to antibodies?
monocytes
eosinophils
basophils
neutrophils
Answer:
basophils
Explanation:
Basophils are a class of white blood cells known as granulocyte, which also include neutrophils, eosinophils, and mast cells. These cells (basophils) are generated in the bone marrow as other white blood cells. When stimulated, basophils degranulate to release histamine, proteoglycans, and proteolytic enzymes and thus mediate immune responses. This process of degranulation occurs when a specific antigen binds to the IgE receptor on the basophil. Moreover, basophils may also be activated by inflammatory mediators (e.g., complement factors such as C5a and C3a, chemokines, etc).
Amoeba Sisters Video Recap of Meiosis: The Great Divide
answers
Answer: I have no idea
Explanation: This question does not have enough information for me to answer it.
Distinguish between acute and chronic diseases.(Class 9 Ncert Answer Pls)
Answer:
Acute diseases refer to the medical condition that occurs suddenly and lasts for a shorter period of time. Chronic diseases develop slowly in our body and may last for a lifetime. Chronic diseases are sometimes fatal.
Answer:
Well, here is your answer...
Explanation:
I am really sorry because I have to search other website for answering this question because I am not in the same grade which you are in... SORRY DEAR !!!
The smell of freshly cut grass occurs because the plant is signaling it is in distress, simultaneously warning other plants, trying to attract a creature to save it, and signaling to the cells around it to divide to close the wound. This type of signal would most likely be:
A. Local signaling
B. Synapse
C. Enzyme
D. Hormone
Answer:
A. local signaling
Explanation:
A point mutation that changes a codon specifying an amino acid into a new codon coding another amino acid is called: a. Deletion mutation. b. Missense mutation. c. Nonsense mutation. d. Frameshift mutation.
Answer:frame shift
Explanation:
In your own words explain why you think it is hard to restore ecosystems to their original conditions once they have shifted. Why doesn't re-introducing predators always 'fix' the trophic cascade? To answer this, think about some of the changes you have seen in ecosystems around the world and even in Maryland. Why can't we always restore balance?
Answer:
This is because predators will find the easiest meals to snack on, even if that includes hunting down endangered or vulnerable species they're supposed to protect.
Explanation:
An example would be the Hawaiian mongoose case. If you don't know, mongoose are very popular due to their brave and aggressive nature, where they'll hunt pests down from rats eating on crop fields to even giant snakes in India that would other wise kill humans in a single venomous bite. This brought up the idea of bringing mongoose to Hawaii, since some rats were being a problem with their agriculture. So they brought 72 of them and started breeding them.
This immediately backfired as they caused many native birds and other native animals trouble as they were eating its eggs. There were so few mongoose hunting down the rats that it was rather better for them to not bring it in the first place. This is why today, Hawaii is very strict on what animal you choose to bring, even your own dog!
Another example would be the Australian dingoes. Except, this was unintentional. A few thousand years ago, their once-domesticated dog ancestors were actually abandoned by their owners from some Southeast Asian area and came down to Australia. They outcompeted existing predators such as the Tasmanian devils on Australia. They simply could produce and maintain more offspring than the Tasmanian devils. This caused the extinction of the last Tasmanian devils in the last couple of decades.
Although the dingoes aren't as bad as the mongoose, who ate everything they could find, as they hunted feral pigs as well as rare hunts on feral cats, they also eat the threatened native species they're meant to protect.
Last and very good example would be New Zealand, home to the most vulnerable birds: Kiwis and Kakapos. Although the taxonomy shows that they have individually evolved flightlessness, they both are vulnerable species. This is because, similar to the dodos, they didn't have predators to begin with. And you can't have a predator to attack the existing invasive species since they'll just snack up on the flightless birds as they're an easier snack anyways.
The more an ecosystem has been isolated, the harder it is to restore balance once invasive species have been introduced. Predators will not hesitate to try new food, such as kiwis. Think about it, if you walk into a pastry and see a new type of cake on display, you might as well give it a go. Predators are just too unpredictable that it's best to leave an ecosystem alone.
