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Bond [772]
3 years ago
6

Which of the following provides the best comparison between reptiles and fish?

Biology
2 answers:
astraxan [27]3 years ago
8 0
I agree with Goten, when i did this quiz that the answer i chose
PtichkaEL [24]3 years ago
5 0
They are both ectothermic, but fish have gills, and reptiles have lungs.
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The inability of organisms to evolve anything that could be an advantage reflects _____.
sergey [27]

The inability of organisms to evolve anything that could be an advantage reflects "the limit of historical constraints".

<h3>What is the limit of historical constraints of evolution?</h3>

Although evolution is a powerful process that leads to

rapid changes in the characteristics of organisms, limits

to evolution arise from a lack of genetic variation, a

loss of well-adapted genotypes in populations due to

gene flow, trait interactions leading to trade-offs, and/

or the difficulty of evolving simultaneous changes in a

number of traits. This is the limit of historical constraints of evolution.

<h3>What are the factors that can cause an organism to evolve?</h3>

Four main factors lead to evolution:

(1) the potential for a species to diversify;

(2) heritable genetic variation among individuals within a species as a result of mutation and sexual reproduction;

(3) competition for scarce resources; and

(4) the spread of organisms that are better able to endure and procreate in the environment.

To learn  more about evolution visit:

brainly.com/question/12051929

#SPJ4

4 0
2 years ago
Levene made which contribution to our understanding of DNA structure? a. He determined that the nucleus contains DNA. b. He dete
Stels [109]

Answer:

The correct answer is  b. He determined that DNA contains four nitrogenous bases.

Explanation:

Levene was an American biochemist who studied the structure of DNA in the early 1900s and in 1920 he found that DNA consists of four nitrogenous bases that are Adenine, Guanine, Thymine, Cytosine.

He also found deoxyribose sugar and phosphate group and said that nucleotide is the basic unit of DNA which contains a ribose sugar with attached nitrogenous base and phosphate group.

He also concludes that an equal amount of adenine, guanine, thymine, and cytosine makes the DNA which is now known as tetranucleotide hypothesis. So the correct answer is b. He determined that DNA contains four nitrogenous bases.  

8 0
3 years ago
what are the evolutionary evidence of giant pandas and why did they stop eating fish anymore PLEASE WHEN ANSWERING WRITE DOWN TH
maks197457 [2]
Http://blogs.discovermagazine.com/seriouslyscience/2015/01/29/pandas-ancestors-ditch-meat-bamboo/



According to this study, it may have had to do with the deactivation (technically known as “pseudogenization”) of an umami taste receptor gene. Umami is the taste that makes things like meat, soy sauce, and mushrooms extra yummy. Apparently, at some point in panda evolution, the umami receptor became non-functional. Based on how much the gene has changed, the authors calculate that this happened around the same time that pandas started eating bamboo. Whether it’s cause or effect is unclear, although the authors think the switch to bamboo may have happened before the gene was lost. Regardless, the loss of the gene reinforced the panda’s vegetarian diet because it made meat less delicious to the bears.

Sorry it's a lot but hope it's useful
4 0
3 years ago
What cell organelle stores water for plant cells
dimaraw [331]
Vacuoles store water in plants
4 0
4 years ago
Read 2 more answers
What two things can make a molecule polar?
Dafna11 [192]

Answer:

Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms.

Explanation:

3 0
3 years ago
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