Cells in your body work together, they form bones, and muscles. Cells, however cannot work alone, they must be able to work together. Each cell does a different thing.
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.
Answer:
ribosome- decoding the message and the formation of peptide bonds
mitochondria- generate most of the chemical energy needed to power the cell's biochemical reactions.
vacuole- maintain water balance
chloroplast- convert light energy into relatively stable chemical energy
Explanation:
<span>Glucose which can also be fats from excess carbohydrates. </span>
Carbohydrates actually get stored in the form of long polymers of glucose molecules or as glycogen starch. They provide energy to the animals for performing their daily duties. Carbohydrates are generally considered the fuel for all organisms, and without this most animals would become sloth and would be unable to perform the regular jobs. Carbohydrates are actually very easy to metabolise and hence generate quick energy.<span>
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