Name the blueprint responsible for making all basic body designs.

Incorrect DNA copying can alter the reproduction process. List the effect of such a case.

What is the significance of body design in determining the habitat of an organism?

An existing population of birds was suddenly wiped out from an area. Give a suitable reason for the same.

How does the reproduction process can be classified on the basis of germ cells involved?

Give one advantage of the asexual mode of reproduction.

Give one difference between sexual and asexual reproduction.

Name the mode of reproduction occurring in Amoeba.

“Multicellular organisms can also reproduce asexually.” Give an example to support the above statement.

A student noticed that an organism by mistake was cut into parts. After some time, both developed into new individuals.

(i) Name the mode of reproduction followed by the organism.

(ii) Give an example or organism which multiply by this process.

A plant that has lost the capacity to produce seed. Name a process using which it can reproduce?

Name the kind of organisms that reproduce by spore formation.

What are the advantages of vegetative propagation?

Name two plants which are grown by the technique of tissue culture.

Why do spores remain viable during unfavorable conditions?

What is Zygote?

Give one difference between bisexual and unisexual flowers.

What constitutes a female reproductive part in a flower?

What are various agents of pollination?

State one reason why cross-pollination is preferred over self-pollination.

Where can zygote be found in flower after fertilization?

‘The seed contains the future plant.’ Why is it said so?

The fruit is developed from which floral part?

What changes take place in boys during the reproductive phase?

What is responsible for attainment of sexual maturity in both males and females?

Sperms are produced in testis, how do they reach the urethra for further passage into the female reproductive tract?

What is the function of testosterone in males?

Name the organ responsible for secreting seminal fluid.

What is the function of the Fallopian tube in the female reproductive system?

What is placenta? Discuss its role in the human body.

What happens when fertilization does not occur in a female body?

Name the individual units of floral whorls.

What type of cell division occurs in Plasmodium during reproduction?

What will happen if Hydra is cut into many pieces?

Some of the fungal hyphe are aerial and bear black blobs. What are these bulb-like structures on sticks called in Rhizopus?

Write the dual purposes served by urethra in males.

Delivery of sperms from where they are produced to the urethra is facilitated by which part?

Which one is one STD among the following? AIDS, diarrhea, genital warts, syphilis.

Is variation more beneficial for the species or for the population? How?

What is the part played by stamens and carpels in sexual reproduction?

Why is cross-pollination considered to be superior to self-pollination?

Differentiate between an ovum and a zygote.

Explain some changes seen in boys during puberty.

Give an example of IUCD for females? What is its mechanism of action?

Name one STD caused by a bacterial infection and one by a viral infection. How can these be prevented?

the normal body growth slows down, and reproductive tissues begin to mature during puberty? Give reason.

Give a few characteristics of asexual reproduction.

When is vegetative propagation used? Name any three methods of vegetative propagation.

Draw a neat and labeled diagram showing longitudinal section of a bisexual flower.

What is implantation? Where does it take place? Mention the structure involved and its function.

Name the organ where ova are formed inside the body. Trace their pathway from formation to Fertilization.

What does HIV stand for? Is AIDS as an infectious disease? List any four modes of spreading AIDS.

Explain

(i) Population control

(ii) Advantage of using contraceptives.

Draw a neat diagram of fate of pollen after landing on stigma. Also, label the following parts.

(i) Female germ cell

(ii) Pollen tube

(iii) Pollen grain

(iv) Male germ cell

What is the function of anther? How does fusion of male and female gametes take place in plants?

(i) State any three characteristics of sexual reproduction.

(ii) Explain, what happens to the egg once it gets fertilized in a human female?

Give reasons why a woman should avoid frequent pregnancies. Explain the following methods of contraception giving one example of each.

(i) Barrier method

(ii) Chemical method

‘DNA copies generated will be similar, but may not be completely identical to the original.’ Explain the statement concerning asexually reproducing organisms.

Explain tissue culture technique. In which area this technique is finding its application?

(i) Give the possibilities for a flower to reproduce by self-pollination.

(ii) What events take place in a flower after fertilization has taken place?

We hear and read about female feticide, which is really a wrong practice. In some families, be it rural or urban, females are

tortured for giving birth to a girl child.

(i) Female feticide leads to which major problem in the country?

(ii) In your opinion, the approach of the society towards mother in this regard is correct Not? Explain with a scientific reason.

(iii) What value will the learners infer from this passage?

You must have seen your mother adding a paste of yeast cells to the idli paste she has prepared. Similarly, the brewing industry uses yeast in the manufacture of alcohol.

(i) How does such a small amount of yeast add help to produce thousands of liters of alcohol?

(ii) Explain how yeast multiplies so fast.

(iii) What are they values shown by your mother?

The diagram shows the cross-section through the carpet of a flower just before fertilization.

Where will the male and female gametes be just before fertilization?

Which conditions are necessary to activate enzymes when a seed germinates?

Given below are certain adaptations in the fruit of certain plants. On the basis of information given below, identify the agent of pollination in both situations.

i. small, dry and light seeds with a parachute of fine hair.

ii. Brightly colored, sweet and juicy but hard seeds.

The diagram represents gametes P and Q fusing to give cell R. This cell then produces gametes S.T.U and V.

Which statement about the numbers of chromosomes in the cells and gametes is corrected.

Among all the methods of contraception, which one can prevent the implantation of the fertilized egg?

The diagram shows the arrangement of blood vessels in the uterus wall and placenta of pregnant women.

Which of the following will increase in concentration in the blood as it flows from 1 and 2?

The diagram shows a section through the female reproductive system.

During pregnancy. Where does mitosis occur in the cells of the embryo?

Define the reproductive health.

Give a reason for the declining balance in sex ratio.

Why expanding population is a matter of concern.

Which is the most commonly used method of birth control.

Name a method which acts as birth control and also protects from STDs.

In what ways, oral contraceptive measure help in birth control.

Name two STDs caused by bacteria.