Which of the following tracheophytes are leafless?

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A sponge of Antarctica which is more than a meter tall is____________?

A. Scolymastra joubini B. Euplectella C. Spongilla D. Leucoselenia...

Which of the following statement about plants is incorrect?

A. All are eukaryotes B. They are multicellular. C. Non-motile organisms D. They Are heterotrophes...

In term of spore production Selaginella is characterized by________________?

A. Homosporous B. Hetrosporous C. Both depending upon the conditions D. None of these...

Which of the following statement about dicots is incorrect _________________?

A. They have 4 or 5 sepals and petals or their multiple. B. They have parallel vein pattern on their leaves C. They are both herbaceous and woody D. Vascular bundles are ring shaped in their stems....

Maximum speed of nerve impulse transmission is____________?

A. 100 m/sec B. 110 m/sec C. 120m/sec D. 130 m/sec....