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ElenaW [278]
3 years ago
7

Which statement about the cell membrane is true?

Biology
2 answers:
xxTIMURxx [149]3 years ago
5 0
D. It prevents harmful substances from entering a cell.
Galina-37 [17]3 years ago
4 0

Answer:

D. It prevents harmful substances from entering the cell. I am very confident in this answer. The cell membrane is selectively permeable, and its job is to let certain things in and to keep certain things out.

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Which conditions are required for natural selection? Select three options.
Archy [21]

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.

3 0
3 years ago
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Wich of the following can combine in a cell to convert a lower-energy molecule into a higher-energy molecule
valentinak56 [21]

Answer:

You're answer is D, ATP+P

Explanation:

7 0
2 years ago
1)Which of the following is a source of genetic variation
Svetllana [295]

The answer is; B

Mutations change the order of nucleotide and therefore affects codons that code for proteins. A different protein is thus produced from the wild type hence creating variations.  Genetic shuffling in sexual reproduction, also called gene recombination occurs during meiosis and also when different organisms exchange genetic material such as in bacteria.  

6 0
3 years ago
Which is the best definition of conservation biology?
murzikaleks [220]
Conservation biology<span> is the management of nature and of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions.</span>
7 0
3 years ago
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If more individuals are born with the advantageous trait in each generation, over time what do you predict will happen to the pe
aivan3 [116]

Answer:

The percentage (%) of the alleles that code for this trait in the population will increase, as more individuals are born with the trait.

Explanation:

The more individuals get born expressing the trait, the higher its frequency gets in the population. By generation, there are more individuals carrying the allele for the advantageous trait. These individuals reproduce and increase the probabilities of the progeny to inherit the mentioned allele. When this sequence keeps occurring in the population over many generations, the allele percentage will increase. On the other hand, the other allele or alleles will decrease. Probably, if there are no changes that might influence or affect this pattern, the alleles for the advantageous trait will fixate, while the other allele might get lost.

3 0
2 years ago
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