Question

what would happen if jellyfish did not have cnidocyte cells?
○ they could not protect themselves.
○ they could not swim quickly.
○ they would be able to see light.
○ they would be able to breathe air.

question 22
1 pts
which of the following describes porifera?
○ a type of segmented worm with two sets of two eyes, multiple antennae, and small appendages
○ group of fish formed when fish loosely adjust their swimming to be near other fish usually of the same size and species
○ the phylum which includes thousands of species such as sponges
○ the phylum name for organisms having a relatively simple body structure

Explanation:

First Question (What would happen if jellyfish did not have cnidocyte cells?)

Cnidocyte cells in jellyfish are used for defense (stinging to protect from predators) and capturing prey. Swimming speed is related to their bell - shaped body movement, not cnidocytes. Seeing light is related to photoreceptor - like structures, and jellyfish don't breathe air. So without cnidocytes, they can't protect themselves.

Porifera is the phylum that includes sponges. The first option describes a type of segmented worm (like a polychaete), the second option describes a school of fish, and the fourth option is too vague as many phyla have simple body structures. Only the third option correctly identifies Porifera as the phylum including sponges.

Answer:

A. They could not protect themselves.

Second Question (Which of the following describes porifera?)