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प्रश्न
The outer layer of the pollen grain is thick and made up of a complex, non-biodegradable substance called _______.
पर्याय
lignin
cellulose
pectin
sporopollenin
उत्तर
The outer layer of the pollen grain is thick and made up of a complex, nonbiodegradable substance called as sporopollenin.
Explanation:
Exine and intine are the two layers that make up a pollen grain. The sporopollenin that makes up the outer layer of exine is hard. It is one of the most durable organic materials ever discovered and is not susceptible to degradation by enzymes, strong acids or alkalis, or higher temperatures.
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संबंधित प्रश्न
Explain the stages involved in the maturation of microspore into a male gametophyte.
In the following case mention the correct ratio of pollen mother cells, generative cells, vegetative cells, and male gametes produced by the microsporangium.
A total of 168 pollen grains with 14 chromosomes in each pollen grain are released from a mature microsporangium.
Which of the following is microspore mother cell?
Read the following statements and select the correct option.
Statement I: Pollen mother cells (PMC) are the first male gametopbytic cells.
Statement II: Each pollen mother cell (PMC) produces two pollen grains.
Which of the following chemically inert compound is observed in the exine of pollen grain?
How many meiotic divisions are required to produce 576 haploid microspores if there are 24 microspore mother cells?
Write the function of LS of Anotropous ovule.
Complete the following flow chart:
Give importance of the following: Germ pores.
Synergids are______.
