THE LIFE CYCLE

Objectives

Write the correlated terms

Explain the following terms.

Reproduction,

Vegetative Propagation,

Pollination

Fertilization.

Mitosis.

Meiosis.

Write the functions of the following organs in reproduction. Vagina, Stigma, Ovaries, Seminal vesicle and Prostate glands, uterus

Diagram

Longitudinal section of flower.

Binary fission in amoeba.

Spore formation in Mucor.

Human female reproductive system.

Answer the following.

What are the advantages of sexual reproduction over asexual reproduction?

Describe sexual reproduction in plants.

Describe the modes of reproduction in unicellular organisms.

Explain the disadvantages of large family size.

Write short notes on

Binary fission

Budding.

Pollination

Regeneration

Germination of seeds

Multiple fission

Importance of variation

Give Scientific Reason.

Regeneration is not the same as reproduction.

Children born to older women may be defective.

Testes are located outside the abdominal cavity in the scrotum.

Multicellular organisms show complex ways of reproduction.

Daughter cells produced by asexual reproduction are genetically identical to the parent cells.

DNA copies generated during reproduction are similar but not identical to the original.

HOTS QUESTIONS & ANSWERS

Answer the following questions in one sentence each

Write the functions of the following organs in reproduction.

Describe the process of fertilization, development and birth in human beings.

Describe the human female reproductive system.

Describe the human male reproductive system.

What are STDs ? How can they be prevented ?

What are sperms ? Give the structure of a sperm cell.

Why do some animals reproduce many young ones and some only one ?

What is the use of sepals and petals to the flower ?

Describe asexual reproduct ion. Also state its advantage and disadvantage.

What is reproduction ? What is its significance ?

State the various modes of asexual reproduction in multicellular organisms.

What is meiosis ? Represent it diagramatically.

What is mitosis ? Represent in diagramatically.

Describe the formation of twins.

Children born to older women may be defective.

Testes are located outside the abdominal cavity in the scrotum.

In the absence of honey bees, the yield of sunflower goes down tremendously.

Siberian cranes migrate to Bharatpur during winter.