题目内容

_________________ is the father of hybrid rice in the world.

A. Mr Yuan Long-ping
B. Mr Mo Yan
C. Ms Wu Ming-zhu
D. Ms Tu You-you

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Who first described the turning movement?

A. Darwin
B. Darwin and his son
C. Linnaeus
D. Linnaeus and his son

What is double fertilization in angiosperms?

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

When animals transmit seeds, it is generally necessary to have _______or _________structures on the surface of fruits to be carried easily

A. smooth
B. barb-shaped
C. spine-shaped
D. wing-shaped

The woody parts developed by plants from ___________to___________ every year are called annual rings.

A. Spring
B. winter
C. Summer
D. Autumn

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