An example of colonial alga is

An example of colonial alga is

Options

(a) Spirogyra (b) Chlorella (c) Volvox (d) Ulothrix

Correct Answer:

Volvox

Explanation:

Volvox is motile colonial freshwater alga with a definite number of vegetative cells.

The arthropod which is known as living fossil is

The arthropod, which is known as living fossil is

Options

(a) Bombyx(silkworm) (b) Locusta(locust) (c) Limulus(king crab) (d) Annelida

Correct Answer:

Limulus(king crab)

Explanation:

Limulus is a living fossil animal. The living fossil […]

The excretory structure of flatworm Taenia are

The excretory structure of flatworm Taenia are

Options

(a) flame cells (b) nephridia (c) malpighian tubles (d) green lands

Correct Answer:

flame cells

Explanation:

The excretory structure of flatworm Taenia are flame cells. […]

Sweet potato is a modified

Sweet potato is a modified

Options

(a) Rhizome (b) Tap root (c) Adventitious root (d) Stem

Correct Answer:

Adventitious root

Explanation:

Sweet potato is a modified adventitious root for storage of food. Rhizomes […]

Secondary growth do not occur in

Secondary growth do not occur in

Options

(a) Riccia (b) Funaria (c) selaginella (d) none of these

Correct Answer:

none of these

Explanation:

Riccia, Funaria, Selaginella shows secondary growth

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