Fill in the boxes given in the figure with appropriate characteristics or plant groups.

Which of the following is not an aquatic animal?

Name the phylum to which the following organisms belong:
$(a)$ Organisms which have a peculiar water-driven tube system that they use for moving around.
$(b)$ Organisms which have a foot that is used for moving around and have an open circulatory system.
$(c)$ These organisms have holes or pores all over the body. These lead to a canal system that helps in circulating water throughout the body.

State the reason for the following:
$(i)$ Nematodes have a pseudocoelom.
$(ii)$ Arthropods have an open circulatory system.
$(iii)$ Echinoderms are named as such.

The skeleton is made entirely of cartilage in:

State whether the following statement is true or false:
Thallophytes are called the amphibians of the plant kingdom.