1. The turkey usually produces females for several generations. How it this possible?
Ans: It is due to parthenogenesis.
2. The meiocyte of an onion plant contains 32 chromosomes. Workout the number of chromosomes found in its endosperm.
Ans:
2n=32(Meiocyte will be diploid)
n=16 (gametes)
3n=3x16=48( Endosperm is triploid)
a) How many different genotypes are likely to be present in human population?
b) Also, how many phenotypes are possibly present?
Ans:
a) 6 Genotypes - IAIA, IAi,( A blood group); IBIB, IBi (B blood GROUP), IAIB (AB blood group), ii (O blood group)
b) 4 Phenotypes - A, B, AB, O blood groups
Ferns, herbaceous lycopods, seed ferns and horse tails.
Ans: seed ferns
5. Name the source of smack. Mention one way in which affects the human body.
Ans: Obtained from Papaver somniferum(Poppy plant)
It acts as depressant
6. In plants, how is alien DNA introduced into the host cell?
Ans: To introduce alien DNA in plants, plant cells are bombarded with high velocity micro particles of gold or tungungsten coated with DNA in a method known as biolistics or gene gun (gene transfer methods).
7. Mr. G eats curd/ yogurt. In this case, which trophic level will be occupy?
Ans: Third trophic level
8. In the absence of the predators, which curve (a) or (b) would appropriately depict the prey populations?
Ans: Curve a