Question

Sponges produce structures called gemmules, which are hard outer coatings protecting a reproductive bud during times of drought. What type of adaptation is this?
a.
Biochemical
b.
Ecological
c.
Structural
d.
Physiological

Answer 1

c. Structural

Gemmules are a morphological (structural) adaptation — a hard outer coating that protects the reproductive bud, helping the sponge survive drought.