11. In angiosperms, pollination results in delivery of sperm cells to the ovary
ID: 203905 • Letter: 1
Question
11. In angiosperms, pollination results in delivery of sperm cells to the ovary after which what happens?
a. Fertilization occurs resulting in a triploid zygote
b. Meiosis occurs resulting in 3 haploid zygotes
c. Mitosis occurs resulting in a larger endosperm
d. Double fertilization occurs resulting in a zygote and triploid endosperm
e. Double fertilization occurs resulting in a diploid endosperm and haploid zygote
12. Fruits are important innovations in the success of angiosperms because
they provide attractive decorations for gardens
they promote cross-pollination and gamete exchange
they make animals evolve
they supply nutrients to the plant
they promote seed dispersal
13. Which of the following accurately describes ‘Alternation of Generation’ in plants?
Some adult plants are sporophytes and some are gametophytes
Plants are haploid but alternate which chromosomes are in cells
Haploid gametophytes and diploid sporophytes are both independent and macroscopic
Haploid and diploid forms are in different parts of a plant
Plants are always diploid but some are small and some are large
Explanation / Answer
Answer:
11). d. Double fertilization occurs resulting in a zygote and triploid endosperm
Explanation.
Double fertilization occurs in angiosperms. Two sperms are released into the embryosac. One sperm fuses one egg cell to produce diploid zygote. Second sperm fuses with diploid secondary nucleus to produce triploid endosperm. This is called doybdo fertilization.
12). they promote seed dispersal
Explanation. After fertilization, ovary becomes fruit and ovules become seeds. Fruits helps in dispersal of seeds from one place to another.
13). Haploid gametophytes and diploid sporophytes are both independent and macroscopic
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