8. How do Organisms Reproduce?, CBSE, Class 10, Science, True False

True False Science Class 10 Chapter 8: How Do Organisms Reproduce

Read the following statements and write your answer as true of false.:

Question.1.
Plants that produce asexually do not produce flower.

False

Question.2.
DNA copying mechanisms creates variations which are useful for ensuring the survival of the species.

True

Question.3.
Sexual reproduction involves two individuals for the creation of a new individual.

True

Question.4.
Transfer of pollen grains from one flower to the stigma of another flower is known as cross-pollination.

True

Question.5.
Vegetative propagation by leaves occurs in sweet potato.

False

Question.6.
Transfer of male gametes to the stigma of flower is called pollination.

True

Question.7.
Sperms mature at a temperature higher than that of human body.

False

Question.8.
Fertilization is the fusion of sperm and ovum.

True

Question.9.
In fission, many bacteria and protozoa simply divide into two or more daughter cells.

False

Question.10.
Animal development is limited to the period prior to bird hatching.

False

Question.11.
Embryo gets embedded in the uterine wall.

True

Question.12.
Acrosome in the sperm carries the genetic material.

True

Question.13.
Ovulation occurs in reproductively active females roughly in the middle of menstrual cycle.

True

Question.14.
Sertoli cells are involved in testosterone production.

True

Question.15.
The only function of the testes is to produce sperm.

False

Question.16.
Birds are oviparous.

True

Question.17.
Before cell division copying of DNA is not essential.

False

Question.18.
Rhizopus reproduces by fragmentation.

False

Question.19.
Placenta is the name of a vital connection between mother and embryo.

True

Question.20.
Reproduction, unlike other life processes, is not essential to maintain the life of an individual organism.

True

Question.21.
One advantage of sexual reproduction is that it allows for genetic sameness.

False

Question.22.
Onset of menstruation is termed as menopause.

False

Question.23.
In human-beings, male can produce sperms upto the age of 45-50 years.

False

Question.24.
Plants produced by vegetative propagation are genetically similar to the parent plant.

True

Question.25.
Reproducing cells don not replicate DNA.

False

Question.26.
Sexually transmitted diseases can be prevented by using condoms.

True

Question.27.
Vegetative propagation produces plants that are genetically similar to the parent plant.

True

Question.28.
The male germ-cell produced by pollen grain contains half the amount of DNA as compared to the other body cells of the plant.

True

Question.29.
Fertilisation of egg takes place in uterus.

False

Question.30.
In male adults testes are located in scrotum to facilitate sperm formation.

True

Question.31.
The ovulation takes place 10-12 days after the start of menstruation.

True

Question.32.
Regeneration is the same as reproduction.

False

Question.33.
Reproduction is not essential for an Individual but to maintain the species.

False

Question.34.
The ovary of a flower grows into a fruit.

True

Question.35.
Sexual reproduction does not lead to variation in a population.

False

Question.36.
In fission, many acteria and protozoa simply divide into two or more daughter cells.

True

Question.37.
Reproduction, unlike other life processes, is not essential to maintain the life of an individual organism.

True

Question.38.
In mammals including man, fertilization takes place externally.

False

Question.39.
Hibiscus has unisexual flowers.

False

Question.40.
Copper-T is a contraceptive device used by women.

True

Question.41.
Bryophyllum propagates through spore formation.

False

Question.42.
Plasmodium multiplies by binary fission.

False

Question.43.
Basic event in reproduction is creation of DNA copy.

True

Question.44.
At the time of birth, a baby girl has thousands of immature eggs.

True

Question.45.
The DNA copying mechanisms create variations which are useful for ensuring the survival of the species.

True

Question.46.
The maternal blood supply mixes frequently with the foetal blood supply during the exchange of waste materials and nutrients.

False

Question.47.
In Spirogyra, asexual reproduction takes place by fragmentation.

True

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