Question

Name the following
a. Thread - like structures in the nucleus.
b. The only animal cell to have plastids.

Answer 1

a. Thread -like structures in the nucleus : Chromosome. In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. There are 46 chromosomes in the human body.

b. The only animal cell to have plastids : Plastid is an organelle found in the cells of plants, green algae, red algae, and certain other protists. The only animal cell to have plastids is the sea slug Elysia chlorotica.