Question

1. which level of biological organization is made up of similar cells working together

a. organ
b. tissue
c. organ system
d. organism

Explanation:

To determine the correct answer, we analyze the levels of biological organization:

• An organ is made of different tissues working together.
• A tissue is defined as a group of similar cells that work together to perform a specific function.
• An organ system is a group of organs working together.
• An organism is a complete living entity made of various organ systems.

Since the question asks for the level made of similar cells working together, the correct option is Tissue.

Answer:

B. Tissue