Biology
Observe the diagrams (A) and (B) given below and answer the following questions.
(a) Label the parts 1 to 5.
(b) What does figure A depict?
(c) What does figure B depict?
(d) Comment on P and Q.
(e) Mention one function each of part 2 and 4.
Answer
(a) The parts 1 to 5 are labelled below:
- 1 → Sperm duct / Vas deferens
- 2 → Testis / Seminiferous tubule
- 3 → Oviduct / Fallopian tube
- 4 → Uterus
- 5 → Ovary
(b) Figure A depicts Vasectomy
(c) Figure B depicts Tubectomy
(d) P is the cut part of vas deferens while Q is the cut part of the oviduct. A small piece of oviduct in females and vas deferens in males is cut and then the remaining portions are ligated as a part of the contraceptive process of tubectomy and vasectomy respectively.
(e) One function each of part 2 and 4 is mentioned below:
- Part 2 (Testes) — They produce the sperm cells or sperms by the process of spermatogenesis.
- Part 4 (Uterus) — It's function is to nourish and house a fertilized egg until the fetus, or offspring, is ready to be delivered.
Related Questions
Our resources cannot keep pace with the rising population. Give three examples in support of this statement.
How can the knowledge of the processes of reproduction help people in limiting the size of their families? Give two concrete examples.
What is the idea behind the phrase "population explosion"?
Given below are hypothetical figures in regard to population (in crores) of two countries A and B during the last three decades.
Country 1971 1981 1991 A 6.4 9.6 10.6 B 15.7 15.7 15.3 Fill in the blanks:
(a) Rate of growth of population of country ……………… has declined between years ……………. and …………….
(b) The country ………………. shows negative population growth between years ………………. and ……………….
(c) The country ……………….. shows zero population growth between years …………….. and ………………..