Question

the earth is populated mostly by single-celled organisms, which of the following is a multi-celled organism?
a. flower
b. human
c. insect
d. all of these

Explanation:

To determine a multi - celled organism, we analyze each option:

• Option A: A flower is part of a plant. Plants are multi - celled organisms as they are made up of many cells that perform different functions like photosynthesis, support, and reproduction.
• Option B: Humans are animals, and animals are multi - celled. The human body has trillions of cells that form different tissues, organs, and organ systems to carry out various life processes.
• Option C: Insects are also animals. They are composed of numerous cells that work together for activities such as movement, feeding, and reproduction.

Since a flower (plant), human (animal), and insect (animal) are all multi - celled organisms, the correct option is D.

Answer:

D. all of these