Daily Practice Problems Reproduction In Organisms

Question 1:

Name the following:

1. The period from birth to the natural death of an organism.

2. A group of organisms which are morphologically and genetically similar.

3. The period of growth and maturity in the life of organisms before reaching a sexually active phase.

4. A plant that flowers once in 12 years.

5. The term given in plants to denote individuals having both male and female reproductive structures.

Question 2:

State the approximate life spans of the following organisms:

1. Butterfly

2. Banyan tree

3. Fruit fly

4. Tortoise

5. Parrot

Question 3:

Identify the methods of asexual reproduction in the following organisms:

1. Hydra

2. Paramecium

3. Sponges

4. Penicillium

5. Chlamydomonas

Question 4:

Give an example of plants which propagate vegetatively by the following vegetative propagules:

1. Bulbs

2. Tubers

3. Rhizomes

4. Offset

5. Sucker

Question 5:

If a plant has 20 chromosomes in its meiocytes, then predict the number of chromosomes present in the following plant parts. Based on your answers, also classify each part as either haploid or diploid.

1. Pollen

2. Anther

3. Ovary

4. Egg

5. Zygote

Question 6:

Define the following terms:

1. Syngamy

2. Senescence

3. Embryogenesis

4. Encystation

5. Fragmentation

Question 7:

State whether the following statements are true or false.

1. In asexual reproduction, gametic fusion is totally absent.

2. Conidia are produced endogenously.

3. Adventitious buds are found to occur on nodes.

4. Primates undergo oestrous cycle.

5. Fishes and amphibians exhibit external fertilisation.

Question 8:

Explain why Amoeba is considered immortal.

Question 9:

Match the columns A and B.

Column A	Column B
1. Buds	a. Sponges
2. Gemmules	b. Mammals
3. Honeybees	c. Hydra
4. Fruit	d. Parthenogenesis
5. Oviparous	e. Ovary
	f. Fishes

Question 10:

Differentiate between external fertilisation and internal fertilisation.

Question 11:
Briefly explain the various phases that occur in the life cycle of a sexually reproducing organism.

Question 12:

Which plant is considered as the “terror of Bengal”? Why is it called so?

Question 13:

Briefly explain the various types into which the plants are classified based on their flowering and fruiting patterns.

Question 14:

How does menstrual cycle differs from oestrous cycle?

Question 15:

What are seasonal breeders? How do they differ from continuous breeders?

Question 16:

Briefly explain the post-fertilisation changes that occur in sexually reproducing organisms.

Question 17:

What is meant by vegetative propagation? Give any two of its advantages.

Question 18:

What is meant by parthenogenesis? Give any two suitable examples.

Question 19:

Name any three hermaphroditic animals.

Question 20:

How would you justify the statement- “Organisms produced by sexual mode of reproduction have better chances of survival over the ones which are produced by asexual modes”?

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