EASY
Earn 100

Pollen grain has two nuclei one is called generative nucleus and the other one is called (polar nucleus/ tube nucleus):

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Important Questions on How do Organisms Reproduce?

HARD
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
What is function of testis in man?
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Write two changes that occur in teenage boys during the period of Adolescence.
HARD
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Write about the changes that occur after fertilization in plants.
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
What are the functions of testis in human being?
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction

The modes by which organisms reproduce depend on the body design of the organisms.

Observe the diagram given below and answer the questions:

Question Image

What is the role of the part marked ‘A’ ?

MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
What are the functions of human testes? Write any two functions.
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
What do you understand by Cross-Pollination?
EASY
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction

What is pollination?

MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Write a point of difference between a male gamete and a female gamete?
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Why does menstruation occur?
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Write names and functions of male and female sex hormones.
HARD
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction

Reproducing organisms create new individuals that look very much like themselves.

Observe the diagram given below and answer the question:

Question Image

What is the function of parts marked A and B?

MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Name such an animal that has external fertilization.
EASY
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
What are unisexual and bisexual flowers? Give examples.
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Explain the female reproductive organs of flower by a well labelled diagram.
EASY
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction

Define the self-pollination.

MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction

Draw a labelled diagram of the longitudinal section of flower.

HARD
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Attempt the following:
Draw a neat scientific diagram of the Female Reproductive System and label:
(a) Vagina
(b) Oviduct.
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Why do variations arise in progeny during sexual reproduction?
MEDIUM
Science>Biology>How do Organisms Reproduce?>Sexual Reproduction
Write a point of difference between pollination and fertilization.