Biology · Class 10 CBSE
A gardener wants to produce many rose plants that have exactly the same characteristics as the parent plant. Which method is the most suitable?
A student observes that a population of bacteria doubles every 20 minutes under favourable conditions. Which mode of reproduction is responsible for this rapid increase?
A farmer grows potatoes from tubers instead of seeds. What is the main advantage of this method?
During fertilisation in humans, what is the primary advantage of the fusion of male and female gametes?
A student says that reproduction is essential for the survival of an individual organism. Which statement correctly evaluates this claim?
Which situation best demonstrates regeneration rather than reproduction?
Why is DNA copying during reproduction not perfectly identical every time?
A flower has brightly coloured petals, nectar, and a pleasant fragrance. What is the most likely advantage of these features?
Which process directly prevents the fertilisation of an egg after a vasectomy?
A doctor advises a couple to use contraceptive methods even though both are healthy. What is the most appropriate reason?
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Amoeba and Hydra both reproduce asexually. Explain how their methods of reproduction are different.
2 marksWhy does sexual reproduction produce greater variation among offspring than asexual reproduction?
2 marksA student accidentally cuts a branch from a money plant and places it in water. After a few days, roots begin to develop. Name the type of reproduction and explain why it is useful for gardeners.
2 marksWhy is DNA copying essential during reproduction? Why is slight variation in DNA considered beneficial for a species?
2 marksExplain any two advantages of using contraceptive methods in humans.
2 marksDescribe the male human reproductive system. Explain the functions of: - Testes - Scrotum - Vas deferens - Urethra - Penis Also explain how these organs work together during reproduction.
5 marksDescribe the female human reproductive system. Explain the functions of: - Ovary - Fallopian tube - Uterus - Cervix - Vagina Also explain where fertilisation and implantation take place.
5 marksCase study: A biology teacher showed two methods of growing plants. In the first method, a rose plant was grown using a stem cutting. In the second method, seeds were collected from a flowering plant and sown in soil. After a few weeks, both methods produced healthy plants. Answer the following questions: (a) Identify the type of reproduction involved in growing the rose plant from a stem cutting.
1 markCase study: A biology teacher showed two methods of growing plants. In the first method, a rose plant was grown using a stem cutting. In the second method, seeds were collected from a flowering plant and sown in soil. After a few weeks, both methods produced healthy plants. Answer the following questions: (b) Which method is more likely to produce offspring with genetic variation? Give a reason.
1 markCase study: A biology teacher showed two methods of growing plants. In the first method, a rose plant was grown using a stem cutting. In the second method, seeds were collected from a flowering plant and sown in soil. After a few weeks, both methods produced healthy plants. Answer the following questions: (c) State one advantage of vegetative propagation for farmers or gardeners.
1 markCase study: A biology teacher showed two methods of growing plants. In the first method, a rose plant was grown using a stem cutting. In the second method, seeds were collected from a flowering plant and sown in soil. After a few weeks, both methods produced healthy plants. Answer the following questions: (d) Explain why genetic variation is important for the long-term survival of a species.
1 mark