题目内容

Coconut can transmit its seed by sea water because it has an ___________and _________ exocarp.

A. heavy
B. large
C. soft
D. fibrous

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What are the structures in the flowers of cereal plants?

A. Calyxes
B. Lodicules
C. Stamens
D. Gynoscium

What are the structures in the florets of cereal plants?

A. Flowers
B. Lodicules
C. Lemma
D. Palea

What is double fertilization in angiosperms?

A. One sperm binds to the egg cell
B. Another sperm binds to the central cell
C. One sperm binds to the synergid
D. Another sperm binds to the antipodal cell

What are the three ways plants bear fruits?

A. Double fertilization
B. Parthenocarpy
C. Apomixis
D. Pollination

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