Algae
Which of the following best describes the algae known as diatoms?

Cells are encased in rigid walls composed of cellulose coated with silicon
Cells have flagella and a light-detecting eye spot
Cells have intricate shells of silicon dioxide with two halves
Cells contain carotenoid pigments as well as chlorophyll A and B

ANSWER DOWNLOAD EXAMIANS APP

Algae
The number of members of the division Phaeophyta that live in freshwater habitats

is equal to the number of members of the division Chlorophyta that live in freshwater habitats
is greater than the number of members of the division Chloro-phyta that live in freshwater habitats
None of these
is lesser than the number of members of the division Chlorophyta that live in freshwater habitats

ANSWER DOWNLOAD EXAMIANS APP