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maria [59]
3 years ago
12

What is the feature of the cell membrane that causes it to be able to "choose" what materials enter and exit?

Biology
1 answer:
mixer [17]3 years ago
6 0
Cell membranes are semi-permeable. That is why they can allow only some substances to enter the cell. It basically depends on the size of the molecules. Smaller atoms like water can easily pass through. However, macromolecules such as sugars, oils and proteins cannot easily pass because they contain a long chain of monomers.
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How do cricket communicate temperature and reactions and body parts allow them to do this?
aleksley [76]

Answer:

as temperature rises, mussles in a crickets body contract more, causing it to chirp more often

Explanation:Crickets, like all living things, have many chemical reactions going on inside their bodies, such as reactions that allow muscles to contract to produce chirping. Crickets, like all insects, are cold-blooded and take on the temperature of their surroundings. This affects how quickly these chemical muscle reactions can occur. Specifically, a formula called the Arrhenius equation describes the activation, or threshold, energy required to make these reactions occur. As the temperature rises, it becomes easier to reach a certain activation energy, thereby allowing chemical reactions, such as the ones that allow a cricket to chirp, to occur more rapidly.

4 0
3 years ago
Part d - do all bacterial cells have the same structures? there are some structures that are common to all prokaryotic cells, an
Tasya [4]

do all bacterial cells have the same structures? no

4 0
3 years ago
Flower color in snapdragons results from the amount of the pigment anthocyanin in the petals. Red flowers are produced by plants
USPshnik [31]

Answer:

The genotypes found in the F2 offspring will be An1An1, An1An2 and An2An2.

Explanation:

In the example given in the question, the color of the petals of snapdragon flowers are given with the An1 allele having full activity and the An2 allele being the null allele. For the F1 offspring, two snapdragon flowers are crossed, one with red petals which is An1An1 and one with ivory petals which is An2An2. All the genotypes for the F1 offspring will result in An1An2.

Then using this F1 offspring, the F2 offspring is found and the genotype of the F2 offspring will be An1An1 / An1An2 / An1An2 / An2An2.

So the genotypes found in the F2 offspring will be An1An1, An1An2 and An2An2. One red petal snapdragon, 1 ivory snapdragon and 2 pink snapdragons.

I hope this answer helps.

8 0
3 years ago
Which statement best explains how enzymes speed up chemical reactions?
motikmotik
Enzymes lower the activation for chemical reactions so they get a  faster *Jump Start.* Once this happens these reactions can happen a lot faster than similar reactions or the same reaction
8 0
3 years ago
Read 2 more answers
Select the correct answer.
Aleonysh [2.5K]

Answer:

THE ANSWER IS C

Explanation:

dna replicate during s phase which occurs in interpahse

8 0
3 years ago
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