Answers
Answer:
A membrane is partially permeable which means if a molecule that is smaller than another it can pass through the membrane but the molecule which is larger cannot (this totally depends on the membrane)
Related Questions
What is the best way to determine family relationship between two individuals?
a. Comparing their blood types.
b. Comparing their genes.
c. Comparing their fingerprints.
d. Comparing their appearances
Answers
b. Comparing their genes.
Which is not the correct statement from the following
calcitonin prevents the process of mixing of calcium from bones to blood
parathormone reabsorbs calcium from kidneys to blood
parathormone stores the excess calcium from blood to bones.
parathormone prevents the storage of calcium in bones.
Answers
Answer:
hello po momodule pako haha
3. The absorptive effectiveness of the small intestine is enhanced by increasing the
surface area by
A villi.
C. digestive juices
B. enzymes.
D. elasticity of intestine,
Answers
Answer:
A villi.
Explanation:
Small intestines have finger-like extensions that basically increase the surface area for nutrients to attach and get transported inside the bloodstream or cells.
Answer:
ashlaylawrence can you fart on my face
Neutral theory proposes that
A) molecular clocks are more reliable when the surrounding pH is close to 7.0.
B) most mutations of highly conserved DNA sequences should have no functional effect.
C) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R groups) have a neutral pH.
D) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R groups) have a neutral electrical charge.
E) a significant proportion of mutations are not acted upon by natural selection.
Answers
Answer:
The correct answer is E) a significant proportion of mutations are not acted upon by natural selection.
Explanation:
The neutral theory, proposed by Motoo Kimura in 1968, proposes that part of the molecular variability produced by mutations that exists in populations is natural variability, that is, a large part of the genetic variation observed in populations is due to random fluctuation of genetic variants that are neutral, on which natural selection hardly acts, so they are not an evolutionary force since they do not contribute predominantly to natural selection and proposes genetic drift as an evolutionary mechanism.
Which website to search for bio answers faster and more answers？
Answers
Answer:
Brainly isgood
Explanation:
Scientists use the scientific method in order to: (select all that apply) answer questions. provide an objective, standardized approach to experimentation. generate evidence to support their arguments. minimize prejudice or bias in the experimenter.
Answers
Answer:
The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. ... It provides an objective, standardized approach to conducting ... By using a standardized approach in their investigations, scientists can feel ... Or they can ignore data that does not support the hypothesis.
Explanation:
Someone pls help me ill give out brainliest pls don’t answer if you don’t know
Answers
Which must be true for natural selection to happen?
A.) There must be genetic variation in the population.
B.) There can be no competition for resources
C.) All organisms must reproduce the same amount.
D.) The population must be below carrying capacity.
Answers
Answer:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Explanation:
ayan p o t a k a
haha
A tertiary consumer is an animal that obtains its nutrition by eating primary consumers and secondary consumers. Usually tertiary consumers are carnivorous predators, although they may also be omnivores, which are animals that feed on both meat and plant material. Function of Tertiary Consumers
Answers
Answer:
The function of tertiary consumers is to keep the population of primary and secondary consumers under control, in addition to serving as food for quarternary consumers.
Explanation:
As stated in the question above, tertiary consumers are those who feed on secondary and primary consumers within the food chain. They represent a very important trophic level, in addition to allowing the transfer of energy between living beings to flow normally, they manage to control the populations of primary and secondary consumers, which keep nature in balance. In addition, they serve as food for other consumers, the quarternarios consumers.
help please I'm stuck
#life sciences
Answers
hope this helps
I do think that they close to not allow too much of either water or air from entering.
the hollow tube allows water to flow easily.
https://www.bbc.co.uk/bitesize/guides/z28g7p3/revision/1
The cells that make xylem have an ability to adapt according to the environment. They open up, lose their ends to make a hollow vessel, and they get strength by lignin, it also supports the plant.
What is xylem vessel?Xylem vessel is a vessel type structure present in plants, that hold water for the plant. They are small vessels, and they loose and tight according to the requirement of water of the plant.
Its main function is to transport water and nutrition. It also supports the plant and give strength to tissues and stems.
Thus, the cells that make up xylem have the ability to adapt to their surroundings. They open up, shed their ends to form a hollow vessel, and lignin provides strength and support to the plant.
Learn more about xylem vessel
https://brainly.com/question/24181670
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The table lists the observations students made about four specimens under a microscope. Based on these observations, what specimens did the
students examine?
A. animal
B.plant
C.virus
D.prokaryote
1.cell membrane present
ribosomes present
lysosomes present
nuclear membrane present
2.cell wall present
ribosomes present
nuclear membrane absent
3.cell wall present
ribosomes present
nucleus present
large vacuole present
4.reproduces inside of a cell
nucleus absent
RNA present
Answers
Answer:
1. A
2. D
3. B
4. C
Explanation:
1. Lysosomes are properties only found in animal cells.
2. Prokaryotic cells such as bacteria present ribosomes, a cell wall but lack a nuclear memebrane.
3. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole.
4. Some viruses reproduce using the lytic cycle. In the lytic cycle, the virus attaches to the host cell and injects its DNA, therefore reproducing inside of a cell.
Will give brainiest for the best detailed answer. Thanks a lot :)
Answers
WHAT HAPPENS TO OUR BODIES WHEN WE EXERCISE?
What is happening to her circulatory system?
When you exercise, or play football in this case, you are working your muscles and certain places in the body. When this happens, your muscles respire (burn the FOOD to produce ENERGY) more faster than they would normally, so the demand for OXYGEN and GLUCOSE is increased.
As the muscles are performing cellular RESPIRATION quicker than the norm, they need oxygen and glucose to reach them faster (glucose and oxygen are the components for cellular respiration), and also they need to get rid of their CO2 (products of cellular respiration are CARBON DIOXIDE and WATER) so the HEART is now pumping blood around the body at a faster rate in order to provide these cells with what they need. To summarize, the circulatory system has to work harder and faster during exercise to provide the cells at work with glucose and oxygen and to get rid of the waste carbon dioxide.
What is happening to her breathing system?
{Relates to explanation given} The requirement for oxygen is increased so now the respiratory system (in particular the LUNGS) have to work harder and faster to take in more oxygen and to exhale more CO2, thus you begin to breathe faster. To summarize, oxygen is inhaled quicker and carbon dioxide is exhaled quicker, therefore the rate of DIFFUSION is increased.
Diagram:
Draw picture of a girl playing football and then in the nest picture of her lungs and heart, you can also include arteries and the veins. Show how the lung and the heart work more harder during the exercise or when playing any sports
hope this helps.....
have a great day ahead :)
State 3 characteristics of iodated salt
Answers
Answer:
1. soluble in water
2. White Crystalline Powder
3. Transparent and Colorless
Write the equation for cellular. Plz help!!!!
Answers
Answer:
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP
Explanation:THANK ME LATER
Which gland helps fight against cold
A. Pituitary gland
B. Thyroid
C. Adrenal gland
D. Pancreas
Answers
Answer:
A. Pituitary gland
Explanation:
How do the process of DNA replication and the laws of inheritance help cells and individuals pass on their
traits?
Answers
DNA copying is otherwise known as DNA replication which is the process of producing 2 identical copies of DNA from one original DNA molecule during cell division. DNA copying is important because it generates variation during sexual reproduction which leads to evolution. Also, DNA copying helps in transfer of information or characters from the parents to the offsprings.
Mendel studied traits with only one mode of inheritance in pea plants. The inheritance of the traits he studied all followed the relatively simple pattern of dominant and recessive alleles for a single characteristic. There are several important modes of inheritance, discovered after Mendel’s work, that do not follow the dominant and recessive, single-gene model.
hope it helps
Directions: Consider a pedigree that is tracking an autosomal recessive trait, where two recessive alleles (tt) result
in the inability to taste a chemical known as PTC. The ability to taste PTC is determined by the presence of a
dominant allele (T). Complete the missing boxes in the chart. The first row has been done for you as an example!
Note: The ability to taste PTC may be more complex than a simple gene trait.
Individual Phenotype
Shaded?
PTC taster
Shape (in Pedigree)
Square
2.
No
1.
3.
4.
5.
6.
Male with genotype TT
Male with genotype Tt
Male with genotype tt
Female with genotype TT
Female with genotype Tt
Female with genotype tt
7.
8.
9.
10.
11.
12.
13.
14.
15.
Answers
which is a nonmendelian trait
Answers
Answer:
Polygenic traits are considered non-Mendelian because their alleles are located on more than one gene which allows for more alleles and phenotypes.
Explanation:
Examples of polygenic traits are hair color and height. Other traits, such as blood type, show codominance, where there is no dominant or recessive allele.
How do the resources available to people influence how they
grow food?
Answers
Answer:
grow
Explanation:grow
which organism has the least energy grass--> rabbit--->raccoon---> wolf
Answers
Answer:
The Wolf
Explanation:
Food chain follows a law called 10% Law.
It follows that the carnivores (secondary consumers) that feed on herbivores and detritivores and those that eat other carnivores (tertiary consumers) have the lowest amount of energy available to them.
Hence wolf has the least energy
which of these is not used by the nervous system to instruct the endocrine system?
A. Neuroendocrine cells
B. Neurotransmitters
C. Hormones
D. Axons
Answers
Answer:
B) Neurotransmitters
Explanation:
The function of a neurotransmitter is either to excite or to inhibit the firing of brain synapses and thus to stimulate or mute brain activity. Some neurotransmitters have a general effect, while others have more specific roles in the brain.
Answer:
Hormones
Explanation:
Just answered the question, and this is the correct response
deficiency symptoms of molybdenum in photosynthesis
Answers
Answer:
Molybdenum deficiency symptoms in most plants are associated with a build-up of nitrate in the affected plant part. This is a result of poor nitrate reductase activity. Symptoms include: pale leaves with interveinal and marginal chlorosis (yellowing) and necrosis (scald);
5. Microwave
Situation: John saw his mother place a cold bread inside a microwave oven. After 3 minutes, his mom removed the bread from the oven and gave it to John John observed that the bread is warm after it was placed in the microwave oven. John wondered what caused the cold bread to warm up after it was placed in the microwave oven.
Observation/s:
Inference:
Answers
The microwave made the bread warm up
Because of the light and the Inclosed area
Describe the roles performed by the cell wall and cell membrane in a plant cell
Answers
Answer:
Cell membrane controls the substances that go in and out of the cell.
Cell wall keeps cell tugid and strong.
44. A food handler does NOT need to worry about time and temperature control when handling which food?
Steamed rice
Cooked beans
Grilled steak
Warmed tortillas
QUESTIONZANSY
Answers
Herbicides are chemicals that kill plants by interrupting important biological processes. Different herbicides affect different plant processes. The herbicide atrazine prevents the chemical reactions that use energy from sunlight.
A plant is sprayed with atrazine.
Exposure to atrazine causes an immediate decrease in the production of two substances in plant. Select the substance.
A. DNA
B. Carbon dioxide
C. Oxygen
D. Phospholipids
Answers
Answer:
oxygen because that's one of the substance that plants produce.
You can also do this by the process of elimination. Knowing that atrazine impedes the production of substances in plants, we know that it can't be DNA and Phospholipid. Carbon Dioxide is used by plant, not produced; thus, oxygen is the answer.
A herbicide is a type of pesticide that is used for controlling the weeds so that the plants can get nourishment. They are common weed killers used to clear taw waste groups and constructional areas.
These herbicides are used for different plants and prevents the chemical reaction that makes use of energy. The plants are sprayed with the chemical called atrazine which is used to decrease the production of oxygen.Hence the option C is correct.
Learn more about the kill plants by interrupting important biological.
brainly.com/question/13970708.
Synthetic fiber has many characteristics that makes it more attractive than natural fiber for making clothing. Which of the following choices are true
1. Synthetic fiber has greater shape retention
2. Synthetic fiber often costs less
3. ALL options are correct
4. Synthetic fiber has greater durability
5. Synthetic fiber is more prone to heat damage in the wash than natural fibers
Answers
Answer:
C
Explanation:
Answer:
C
Explanation:
Which of the following is an example of artificial selection?
Answers
Answer: last option
Explanation:
artificial selection is when humans basically pick a desirable trait in a species and take steps to enhance or perpetuate that specific trait so that it's more common
the best option to describe this is the last one, because humans have bred domestic dogs to be less aggressive and more playful or friendly
In a non-mutated DNA strand, what base pairs with guanine?
Answers
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Explanation:
Answer:
cytosine pairs with guanine.
how does the pH of milk change when it is fermented to make yoghurt
Answers
Answer:
it gets lower
Explanation:
when milk begins to ferment it gets sour becoming more acidic and the pH gets lower.
