Which of the three circumstances among these are most necessary in the germination of single seed plants?
Correct Answer:
(B) Water, proper temperature, oxygen
Water, proper temperature and oxygen are the most required substances/circumstances for the germination of seed, while the sunlight is not essential. There are two types of germination of seed in plants-epigeal and hypogeal.
Ques: 2
Consider the following kinds organisms –
1. Bat 2. Bee
3. Bird
Which of the above is/are pollinating agent/agents?
Correct Answer:
(D)
1, 2 and 3
Pollination is the act of transferring pollen grains from male anther of a flower to the female stigma. It is a prerequisite for fertilization. Fertilization allows the flower to develop fruits and seeds. Bees are the most important pollinating agent. Pollination by bees and butterflies often occurs in the flowers which bloom in the day time. Hummingbird-pollinated flowers appear in warm colours like red, yellow and orange. Bat is also a pollinating agent of many flowers. However, the number of animals - pollinated flowers are not so high, some of them are found in the southern hemisphere.