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solniwko [45]
3 years ago
8

Purines and pyrimidines are

Biology
1 answer:
il63 [147K]3 years ago
7 0

Answer:

answer to the question is B

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The order Cetacea includes modern-day whales, dolphins, and porpoises. These marine mammals share common characteristics that ha
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Answer:

The correct option is A. they evolved from land mammals.

Explanation:

Evolution can be described as a process through which organisms in a species change over a period of time due to the natural selection of the environment. Those organisms that have many similarities in their functions or structures are considered closer to one another and have the same common ancestors.

The properties mentioned in the question about cetaceans resembles the properties of land mammals. For example, cetaceans lack gills and breathe air. Land mammals also do not have gills and need to respire for living. The cetaceans have fin bones which are similar to the limb bones in the land mammals. Hence, these observations show that cetaceas have evolved from land mammals.

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Which human activity would help reduce the amount of carbon dioxide in the atmosphere
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Burning coal  

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The emissions of carbon dioxide would reduce because then they will consume less gasoline. Instead of coal burning, this would reduce the overall concentrations of greenhouse gas emissions and generate energy from wind.

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2 years ago
Which term describes an area where sugars are used or stored?
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<span>Sink 

A sink is an area where sugars are used or stored; typically, these are the roots and fruits of a plant.</span>
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3 years ago
WILL THUMBS UP RIGHT ANSWER!!
NISA [10]
True that should be the answer

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