Hard calcium carbonate structures are used as a skeleton by

Find out the incorrect sentence.

Classify organisms of kingdom $Protista$ on the following basis and give an example of each:
$(a)$ Based on structure for locomotion.
$(b)$ Based on mode of nutrition.

State reasons for the following:
$(a)$ Protists have appendages like cilia or flagella.
$(b)$ Angiosperms are called so.
$(c)$ Fish have scales on their body.

Thallophyta,Bryophyta and Pteridophyta are classified as Cryptogamae,whereas Gymnosperms and Angiosperms are classified as Phanerogamae. Why?

$(i)$ To which division of Plantae do algae belong? Write one characteristic of the division. Give two examples.
$(ii)$ Name the group:
$(a)$ Which includes unicellular eukaryotic organisms.
$(b)$ In which the mode of nutrition is saprophytic.
$(c)$ In which seeds are not enclosed in fruit.
$(iii)$ Classify flowering plants on the basis of the number of cotyledons present in the seed.