Answer:
Living on earth is similar to living on an island because its all about survival and the resources are limited. For instance living on earth the things you need to do to obtain food and provide shelter. Obtaining a job and or multiple jobs.
The answer that I got is C.
The cell wall and chlorophyll are absent in animal cells. These are unique to plant cells.
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.
