Question

what structures enable starfish to walk?
select one:
a. suckers
b. spines
c. tube feet

the phylum to which corals, jellyfish and sea anemone belong is:
select one:
a. pisces
b. arthropoda
c. cnidaria

Explanation:

1. For the first question: Starfish use their tube feet, part of their water vascular system, for locomotion, attachment, and feeding. Suckers are part of tube feet but not the full structure, and spines are for protection.
2. For the second question: Corals, jellyfish, and sea anemones all have stinging cells (cnidocytes) and radial symmetry, which are defining traits of the phylum Cnidaria. Pisces are fish, and Arthropoda are invertebrates with exoskeletons and jointed limbs.

Answer:

1. c. tube feet
2. c. Cnidaria