HOW DO ORGANISMS REPRODUCE– 1 Mark Questions

Q1.  What happens when Planaria gets cut into two pieces?

Q2.  Why are testis located outside the abdominal cavity?

Q3.  In which part of the female reproductive tract does the egg gets fertilised?

Q4.  What is the function of the umbilical cord?

Q5.  How hormonal methods of contraception act?

Q5. Name the type of reproduction mostly seen in unicellular organisms.

Q6. Name the plant that reproduces vegetatively by leaf.

Q7. When a cell reproduces, what happens to its DNA?

Q8. Name the method by which Hydra reproduces. Is this method sexual or asexual?

Q9. State the method used for growing rose plants and jasmine plants.

Q10. “Cell division is a type of reproduction in unicellular organism”. Justify.

Q11. List two functions of ovary of human female reproductive system.

Q12. Name the organs producing sperms and ova respectively in humans.

Q13. Give reason for the statement-‘Since the ovary releases one egg every month, the uterus also prepares itself every month by making its lining thick and spongy’.

Q14. No two individuals are absolutely alike in a population. Why?

Q15. How do we know that two different individuals belong to the same species?

Q16. In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.

Q17.       Name the individual units of floral whorls.

Q18.       Delivery of sperms from where they are produced to urethra is facilitated by which part?

Directions (Q. Nos. 19 – 23) In the following questions, a statement of Assertion is followed by a statement of Reason. Mark the correct choice as

(a) If both Assertion and Reason are true, and Reason is the correct explanation of Assertion

(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

(c) If Assertion is true, but Reason is false

(d) If Reason is true, but Assertion is false

(e) If both Assertion and Reason are false

Q19. Assertion: The uterus prepares itself every month to receive a fertilised egg.

            Reason: The ovary releases one egg every month.

Q20. Assertion: Ureter forms the common passage for both the sperms and urine.

            Reason: It never carries both of them at the same time.

Q21. Assertion: Zygote is form by fusion of sperm with Egg.

            Reason: Both the sperm and the egg are haploid.

Q22. Assertion: Pollination is the transfer of pollen grain to the anther.

            Reason: Pollination is carried out by wind, birds and insects.

Q23. Assertion: Contraception is used to avoid unnecessary pregnancies.

            Reason: Contraception is used by both males and females.

Q24.  Callus is defined as

(a) an insoluble carbohydrate

(b) tissue which forms embryo

(c) tissue which grows to form embryoid

 (d) an unorganised actively dividing mass of cells maintained in a culture

Q25.  What is the role of secretions of seminal vesicles and prostate glands?

(a) Provides transport medium only

(b) Provides nutrition only

(c) Provides maturation of ovary

(d) Both (a) and (b)

Q26. Identify the disease which is caused by a virus.

(a) Syphilis                        

(b) Genital warts

(c) Gonorrhoea                     

(d) Both (a) and (c)

Q27.  What would be the major effects of removing ovary on female reproductive system?

(a) Production of egg will stop forever

(b) Hormones will produce in large amount

(c) Entry of male gametes into oviduct will halt

(d) All of the above

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