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Nata [24]
4 years ago
7

How did some stickleback populations come to live exclusively in fresh water?

Biology
1 answer:
mihalych1998 [28]4 years ago
3 0

Answer: Some sticklebacks were stranded in lakes that were formed in the ice age

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Need answer for both questions pls help
In-s [12.5K]
First answer is A
Second answer is C
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2 years ago
Janta<br>Page No.<br>Dato<br>1 Which of the following is not a nationa) 03.tiva​
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Which of the following shows fitness?
NeTakaya

Hii!! I believe the correct answer is C. the predator captures the organism very fast and easy. (:

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3 years ago
For plants and other organisms to develop differences among their respective species the alleles of their genes must contain var
olasank [31]

A) <u>Mutation</u> is the original source of variations for plants and other organisms  which develops differences among their respective species

Explanation:

Genetic variation leads to the natural differences between each individual and among individuals of a species. The main cause for this variation is due to alleles that cause variations in the composition of genes or the DNA sequences.  

A mutation is a genetic variation which leads to the creation of a new allele in a species population. Each variation in the DNA sequence leads to an allele formation and each allele leads to a difference in character or trait between individuals since they are the alternate version of the original genes.  

Although genetic variations could be brought about by crossing over, random fertilization, or independent assortment; mutation is the original source because it provides the basic raw material for all the evolutionary changes.

8 0
3 years ago
What would be the advantage(s) to having no chloroplasts in the cells of the spongy mesophyll?
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Well, first off the spongy mesophyll does have some chloroplasts, however they are located quite far from the surface of the leaf where most of the chloroplasts are. Therefore they don't get much light and don't contribute a lot to photosynthesis in the leaf. So why should the leaf waste the energy in making chloroplasts if there is not enough light to make them all efficient enough at photosynthesis?
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