How do organism reproduce

 

Science MCQs 

How do Organisms Reproduce?

1. During favourable conditions, Amoeba reproduces by
(a) multiple fission
(b) binary fission
(c) budding
(d) fragmentation

Ans: b

2. A feature of reproduction that is common to Amoeba, Yeast and Spirogyra is that
(a) they reproduce asexually
(b) they are all unicellular
(c) they reproduce only sexually
(d) they are all multicellular

Ans: a

3. The ability of a cell to divide into several cells during reproduction in Plasmodium is called
(a) budding
(b) multiple fission
(c) binary fission
(d) reduction division

Ans: b

4. Bryophyllum can be propagated vegetatively by the
(a) stem
(b) leaf
(c) root
(d) flower

Ans: b

5. Vegetative propagation refers to formation of new plants from
(a) stem, flowers and fruits
(b) stem, leaves and flowers
(c) stem, roots and flowers
(d) stem, roots and leaves

Ans: d

6. In a potato, vegetative propagation takes place by:
(a) root
(b) leaf
(c) stem tuber
(d) grafting

Ans: c

7. Vegetatively propagated plants
(a) do not bear roots
(b) do not bear buds
(c) are genetically similar
(d) are genetically dissimilar

Ans: c

8. Spirogyra reproduce by
(a) budding
(b) fragmentation
(c) regeneration
(d) fission

Ans: b

9. In Rhizopus, tubular thread like structures bearing sporangia at their tips are called
(a) filaments
(b) hyphae
(c) rhizoids
(d) roots

Ans: b

10. Plants like banana, rose, jasmine, orange have lost the capacity to produce
(a) seeds
(b) buds
(c) flower
(d) roots

Ans: a

11. The flower of the Hibiscus plant is
(a) bisexual
(b) unisexual
(c) neuter
(d) very small

Ans: a

12. The part of the flower which is present in the centre of the flower is
(a) Sepals
(b) Petals
(c) Carpels
(d) Stamens

Ans: c

13. The seed that contains the future plant is called the
(a) cotyledons
(b) seed coat
(c) germ cells
(d) embryo

Ans: d

14. The period of pregnancy is called
(a) gestation period
(b) incubation period
(c) ovulation
(d) menstruation period

Ans: a

15. The process of release of eggs from the ovary is called
(a) menstruation
(b) reproduction
(c) insemination
(d) ovulation

Ans: d

16. The period during adolescence when the reproductive tissues begin to mature is called
(a) ovyfetion
(b) puberty
(c) germination
(d) propagation

Ans: b

 

17. In human beings, the fertilization occurs in the
(a) uterus
(b) ovaries
(c) fallopian tubes
(d) vagina

Ans: c

18. Along the path of the vas-deferens the secretions of which gland provide nutrition to the sperms?
(a) Prostate glands
(b) Seminal vesicles
(c) Scrotum
(d) Urinary bladder

Ans: b

19. The embryo in humans gets nutrition from the mother’s blood with the help of a special tissue called
(a) Placenta
(b) Villi
(c) Uterus
(d) Womb

Ans: a

20. Which among the following diseases is not sexually transmitted?
(a) Syphyllis
(b) Hepatitis
(c) HIV-AIDS
(d) Gonorrhea

Ans: b

21. Which of the following method of contraception protects from acquiring sexually trans¬mitted diseases?
(a) Surgery
(b) Condoms
(c) Copper-T
(d) Oral-pills

Ans: b

22. In human males, the testes lie in the scrotum, because it helps in the
(a) process of mating
(b) formation of sperms
(c) easy transfer of gametes
(d) secretion of estrogen

Ans: b