Archegonium is the female sex organ that produces the female gamete or egg. It is present in the life cycles of bryophytes, pteridophytes, and gymnosperms.

Explain the role of sex hormones in the female reproductive cycle.

Name the phenomenon and one bird where the female gamete directly develops into a new organism.

In bryophytes, male and female sex organs are called as ……….. and ……….. .

(a) Name the human male reproductive organ that produces sperms and also secretes a hormone. Write the functions of the secreted hormone. (b) Name the parts of the human female reproductive system where- (i) Fertilisation takes place (ii) Implantation of the fertilised egg occurs. (c) Explain how the embryo gets nourishment inside the mother's body.

X is a human being with the reproductive oval shaped almond sized organ Y which releases mature gamete Z monthly once that goes into tube like structure A where it fuses with another gamete called B to form a new cell C. This cell C divides vigorously to form a ball of cells D which gets embedded in the thick lining of organ E of the reproductive system of X where it grows and develops into a foetus. i] Identify X, as male or female. ii] Name the reproductive part Y and give its two functions. iii] Name the gametes Z and B. Iv] Name the process which leads to the formation of C and Identify C. v] Name the ball of cells D. vi] Identify the organ E.

In certain simple plants, why are male gametes produced in large numbers as compared to the female gametes? It is applicable in animals also? Yes or not.

(i) How many eggs are produced every month by either of the ovaries in a human female? Where does fertilization takes place in the female reproductive system? (ii) What happens in case the eggs released by the ovary is not fertilized?

(a) Name the respective part of human female reproductive system: (i) that produces eggs, (ii) where fusion of eggs and sperm takes place. (b) Describe in brief what happens to the zygote after it gets implanted.