Question

question 3
the structure that is called the \powerhouse\ of the cell is the:
○ cytoplasm.
○ endoplasmic reticulum.
○ mitochondria.
○ golgi apparatus.

question 4
when many similar cells specialize to perform a certain function, it is referred to as a(n):
○ tissue.
○ organelle.
○ organ system complex.
○ organism.

question 5
a frontal section divides the body into _____ portions.
○ upper and lower
○ right and left
○ front and back
○ cortex and medullary

Explanation:

Question 3

In cell biology, mitochondria are known as the "powerhouse" of the cell because they produce ATP (energy) through cellular respiration. Cytoplasm is the fluid matrix, endoplasmic reticulum is for protein/lipid synthesis, and Golgi apparatus modifies and packages proteins. So the correct option is mitochondria.

In biological organization, a tissue is a group of similar cells that specialize to perform a specific function. An organelle is a cell structure, an organ system complex is a group of organs, and an organism is a whole living entity. So the correct option is tissue.

A frontal (coronal) section divides the body into front (anterior) and back (posterior) portions. A transverse section divides into upper and lower, a sagittal section divides into right and left, and cortex/medullary are not related to frontal section division. So the correct option is front and back.

Answer:

C. mitochondria.

Question 4