Download App

Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
Write the differences between wind-pollinated and insect-pollinated flowers. Give an example of each type.
✓

Answer

S. No.
Wind-pollinated flowers
Insect-pollinated flowers
(i)
These produce large numbers of pollen grains.
These produce less number of pollen grains.
(ii)
These are dull, nectarless and scentless.
These are bright, scented and have nectar.
(iii)
Stamens are long and protrude above petals.
Stamens lie within the corolla tube.
(iv)
The pollen grains are dry, light, small and smooth. For example, ragweed.
The pollen grains are larger, heavier with appendages like hooks and barbs. For example, rose, sweet pea.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Sexual Reproduction in Flowering Plants→Sexual Reproduction in Flowering Plants — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

State the significance of pollination. List any four differences between wind pollinated and animal pollinated flowers.
→
How is DNA recombinant technology helpful in detecting the presence of mutated genes in the cancer patients?
→
Name two diseases each, which are transmitted in the following ways:
  1. Through contaminated food and water.
  2. Through insect vectors.
  3. Through the air/ droplet inhaled.
→
Seeing a crowd of students in one corner of the school, the principal rushed to see the matter and found some children beating and chasing a small lizard. On seeing the principal, all the children fled to their classes except Alok who requested the principal to arrange for some medical assistance for the injured animal. The principal rewarded Alok for his attitude to save guard our biodiversity.
  1. Mention the factors resulting in loss of biodiversity
  2. Was Alok an indisciplined boy, who did not run to the class on seeing the principal? What values does the act promote?
→
Enumerate the complications that untreated STDs can lead to.
→
Name and describe the technique that helps in separating the DNA fragments formed by the use of restriction endonuclease.
→
Write important features of a sedimentary cycle in an ecosystem.
→
Alien species invasion has been a threat to biodiversity. Justify with the help of a suitable example. List any other three causes responsible for such a loss.
→
Answer the following questions:
Write the characteristic features of anther, pollen and stigma of wind pollinated flowers.
→
  1. What is primary productivity? Why does it vary in different types of eco - systems?
  2. State the relation between gross and net primary productivity.
→