Trey is looking at a cell under the microscope. it is attached to many other cells, and it has a nucleus and membrane bound organelles. it has no cell wall. in which kingdom should this organism be classified?
a. animalia
b. archaebacteria
c. fungi
d. plantae

The correct option is -

a. Animalia.

Explanation:

Animalia is a kingdom of multicellular, eukaryotic organisms that lack a cell wall around cell membrane.

They have true nucleus and membrane bound subcellular organelles like mitochondria, endoplasmic reticulum, golgi complex, etc.

Example- Human beings, Dogs, Cats, Rats.

As per the given information in the question, cell under the microscope observed as attached to many other cells, and it has a nucleus and membrane bound organelles. it has no cell wall.

Thus, the organism of this cell is grouped into Animalia kingdom.

the correct answer is:

a population changes in response to a change in the environment.