Question

question 3 of 10
in multicellular organisms, cells that do a specific job are often grouped
together into masses or layers that are more complex systems. what are
these more complex systems called?

a. body systems

b. tissues

c. organs

d. organelles

Explanation:

To solve this, we recall the biological organization levels. Cells with similar functions group into tissues. Organs are made of tissues, organ systems of organs, and organelles are within cells. The question asks about groups of cells (with specific jobs) forming more complex systems, which is tissues.

Answer:

B. Tissues