Question

1 mention three function of ovary in mammal
2 outline five difference b/w male gamete and female gamete
3 define tolerance 4 define pest
5 mention 4 method of controlling pest and explain them
6 define adaptation 7 state four characteristics of respiratory surface
8 define conservation
9 mention 3 resources that are conserved
10 outline 5 benefit of conservation of natural forest

Answer 1

Answer:

ans.1 These glands have three important functions: they secrete hormones, they protect the eggs a female is born with and they release eggs for possible fertilization.

ans.2 S.no. Male Gametes Female Gametes

1. The male gametes are known as sperms and are produced by the process of spermatogenesis. The female gametes are known as the egg or ovum and are produced by oogenesis.

2. They are usually small and motile. They are large and nonmotile.

3. They are produced in large numbers. Only a single gamete is formed at a time.

4. In humans, the male gametes decide the sexuality of the offspring. Female gametes do not determine sexuality in humans.

ans.4 Control of these pests is attempted through exclusion, repulsion, physical removal or chemical means. Alternatively, various methods of biological control can be used including sterilisation programmes.