COMPLETE 12th

• A

• B

• C

• D

In oogamy, fertilization involves

• a small non­motile female gamete and a large

  motile male gamete

• a large non­motile female gamete and a small

  motile male gamete

• a large non­motile female gamete and a small

  non­motile male gamete

• large motile female gamete and a small non­

  motile male gemete.

• A

• B

• C

• D

• A

• B

• C

• D

Which of the following statements is not

correct?

• Pollen germination and pollen tube

  growth are regulated by chemical

  components of pollen interacting with

  those of the pistil.

• Some reptiles have also been reported as

  pollinators in some plant species.

• Pollen grains of many species can

  germinate on the stigma of a flower, but

  only one pollen tube of the same species

  grows into the style.

• Insects that consume pollen or nectar

  without bringing about pollination are

  called pollen/ nectar robbers.

• A

• B

• C

• D

Total number of meiotic divisions required for

forming 100 zygotes/100 grains of wheat is

• 100

• 75

• 125

• 50

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D