Vardaan Learning Institute

Topic: How do Organisms Reproduce?

Class: 10 (Science) Type: Bonus Practice Paper Max. Marks: 50
Name:
Date:
SECTION A: OBJECTIVE TYPE QUESTIONS (1 Mark Each)
1. Transfer of pollen grains from anther to stigma of the same species is necessary because:
  1. Stigma of one flower to Stigma of another (same plant)
  2. Anther of one flower to Stigma of same flower
  3. Anther of one flower to Stigma of another flower (different species)
  4. Anther of one flower to Stigma of another flower (same species)
2. Which of the following is NOT a part of the female reproductive system in human beings?
  1. Ovary
  2. Uterus
  3. Vas deferens
  4. Fallopian tube
3. The anther contains:
  1. Sepals
  2. Ovules
  3. Carpel
  4. Pollen grains
4. Which of the following methods of contraception protects from acquiring Sexually Transmitted Diseases (STDs)?
  1. Surgery
  2. Condoms
  3. Copper-T
  4. Oral pills
5. Bryophyllum can be propagated vegetatively by the:
  1. Stem
  2. Leaf
  3. Root
  4. Flower
6. The site of implantation of the fertilized egg in human female is:
  1. Ovary
  2. Uterus
  3. Vagina
  4. Oviduct
7. During favourable conditions, Amoeba reproduces by:
  1. Multiple fission
  2. Binary fission
  3. Budding
  4. Fragmentation
8. Which of the following is an example of a spore-forming organism?
  1. Plasmodium
  2. Rhizopus
  3. Leishmania
  4. Spirogyra
9. Asexual reproduction takes place through budding in:
  1. Amoeba
  2. Yeast
  3. Plasmodium
  4. Leishmania
10. Spirogyra reproduces by:
  1. Fragmentation
  2. Regeneration
  3. Fission
  4. Budding
Directions (Q11-Q14): In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
11. Assertion (A): Spores are unicellular bodies.
Reason (R): The parent body generates thousands of spores which individually grow into new plants.
12. Assertion (A): Testes are located outside the abdominal cavity in scrotum.
Reason (R): Sperm formation requires a temperature lower than the normal body temperature.
13. Assertion (A): Sexual reproduction brings about more variations than asexual reproduction.
Reason (R): Sexual reproduction involves fusion of two different gametes from two different parents.
14. Assertion (A): Vegetative propagation makes it possible to propagate plants like bananas, rose, and jasmine that have lost the capacity to produce seeds.
Reason (R): Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds.
SECTION B: SHORT ANSWER QUESTIONS (3 Marks Each)
15. Differentiate between Fragmentation and Regeneration with one example of each.
16. (i) Why is DNA copying an essential part of the process of reproduction?
(ii) Why is variation beneficial to the species but not necessarily for the individual?
17. (i) What is the function of the placenta?
(ii) What happens if the egg is not fertilized?
18. List four methods of contraception used by humans. How does the use of these methods have a direct effect on the health and prosperity of a family?
19. What are the changes seen in girls at the time of puberty?
20. What is AIDS? Name its causative agent. List two modes of transmission of this disease.
SECTION C: LONG ANSWER QUESTIONS (5 Marks Each)
21. (i) Draw a longitudinal section of a flower and label the following parts: (a) Anther (b) Ovary (c) Stigma (d) Style.
(ii) Distinguish between self-pollination and cross-pollination.
22. (i) Draw a diagram of the human female reproductive system and label the parts: (a) Ovary (b) Oviduct (c) Uterus (d) Cervix.
(ii) Describe the changes in the uterus (a) if the egg is fertilized (b) if the egg is not fertilized.
SECTION D: CASE STUDY (4 Marks)
23. Read the following text and answer the questions:
Sexual reproduction involves the formation and fusion of gametes. It is a complex process but leads to great variation in offspring. In flowering plants, the reproductive parts are present in the flower. The stamens are the male reproductive part and the pistil is the female reproductive part.

(i) Name the male and female gametes in a flowering plant. (1 Mark)
(ii) What is syngamy? (1 Mark)
(iii) Explain double fertilization. (2 Marks)
24. Read the following text and answer the questions:
The reproductive system of human beings becomes functional at puberty. The male reproductive system produces sperms and the female reproductive system produces ova. Fertilization takes place in the fallopian tube. The embryo gets nutrition from the mother's blood with the help of a special tissue called placenta.

(i) What is the average duration of human pregnancy (Gestation period)? (1 Mark)
(ii) Name the hormone responsible for secondary sexual characters in males. (1 Mark)
(iii) How does the placenta facilitate the waste removal from embryo? (2 Marks)
"All the best!"