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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