8. For each statement, use the following options (A-D) to indicate which group o
ID: 207809 • Letter: 8
Question
8. For each statement, use the following options (A-D) to indicate which group of plants it refers to: (Choices may be used once, more than once, or not at all). PLANT GROUPS: (A) true for Angiosperms only (B) true for Gymnosperms only (C) true for both Gymnosperms and Angiosperms (D) true for neither Gymnosperms nor Angiosperms c 1. Pollen is the male gametophyte. 2. Fruits aid in seed dispersal. a. A b. C 3. Fertilized mature ovules are known as seeds. 4. The nutritive tissue is produced before fertilization. 5. The male parent contributes genes to the nutritive tissue. c. B 9. If a moss had a mutation that inhibited the production of sporopollenin, which of th e followi na would ecuExplanation / Answer
1. Pollen.....
C. Both gymnosperm and angiosperm
Pollen represents highly reduced form of male gametophyte. It is present in both angiosperms and gymnosperms.
B. Fruits......
A. True for angiosperms only
The seeds of angiosperms are covered by fruit. The fruits are eaten by animals and this aids in dispersal of seeds. However, the gymnosperms produce fruitless seeds.
3. Fertilized...
C. True for both gymnosperms and angiosperms.
Ovules in case of both angiosperms and gymnosperms, ungergo fertilization by male gametes. This matures and develops into seeds.
4. The nutritive......
B. For gymnosperms only
In case of gymnosperms, the female gametophyte tissue acts as the nutritive tissue. So, the nutritive tissue formation occurs prior to fertilization (irrespective of whether fertilization occurs or not). But in case of angiosperms, the endosperm ( which is the nutritive tissue) , forms along with the fertilization (by double fertilization).
5. The male..........
A. True for angiosperms only
In case of angiosperms, the endosperm (nutritive tissue), is formed by double fertilization. For endosperm formation one of the sperm nucleus fuses with two polar nuclei. This results into formation of triploid endosperm. However, the gymnosperm nutritive tissue is derived from female gametophyte, so there is no contribution of male parent.
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