Questions

QUESTIONS

A.     Fill in the blank:

1. The stage of the embryo in which all the body parts can be identified in called a ______.

Ans: Foetus

2.  Developing zygote attaches to the uterine wall by ______.

Ans: Placenta

3. Babies born through IVF (In vitro fertilization) technique are known as ______.

Ans: Test tube babies

4.   Animals giving birth to young ones are called ______.

Ans: Viviparous

5.   Animals laying eggs are called______.

Ans: Oviparous

6. Full form of IVF is ________.

Ans: in vitro fertilization

7. Cloning of an animal was successfully performed for the first time by _______.

Ans: Ian Wilmut

8. Ian Wilmut cloned a sheep named _______.

Ans: Dolly

9. In some organisms, the fertilized eggs hatch into females, while the unfertilized eggs give rise to males, called ______.

Ans: Drones

B.     Multiple Choice Questions:

1. The correct sequence of development in sexual reproduction is :-

(a) Implantation → Mating → Fertilisation → Development

(b) Development → Fertilisation → Implantation → Mating

(c) Mating → Fertilisation → Implantation → Development

(d) Fertilisation → Implantation → Development → Mating

Ans: (c)

2. Egg laying animals are called as :-

(a) Mammals   (b) Birds            (c) Viviparous   (d) Oviparous

Ans: (d)

3. Some Organisms give birth to their young ones and feed them through their breast (milk). Such organisms are known as:

(a) Amphibians                            (b) Mammals

(c) Reptiles                                    (d) Birds

Ans: (b)

4. Cloning means :-

(a) Developing an exact copy of entire organism.

(b) Developing a part of organism.

(c) Transplanting an organ into the host body.

(d) None of the above.

Ans: (a)

5. Sequential changes occurring during the outside the mothers body is known as

(a) Reproduction                          (b) Metamorphosis

(c) Fertilisation                             (d) Implantation

Ans: (b)

6. The only honey bee in the colony that lays eggs is called-

(a) Queen          (b) Drone           (c) Worker        (d) All

Ans: (a)

7. Viviparity is found in

(a) Rabbit          (b) Frog             (c) Earthworm (d) Pigeon

Ans: (a)

8. Foetus is nourished by ______ in human

(a) Blood            (b) Yolk              (c) Placenta       (d) Phagocytosis

Ans: (c)

C.     Name the following:

1. Transformation of larva into an adult through a series of sequential changes. ______. 

Ans: Metamorphosis

2. Technique through which multiple copies of a single gene, chromosome or whole organism can be produced. _____.

Ans: Cloning

3. The first clone generated at Roslin Institute, Scotland.

Ans: Dolly- a sheep

4. Larval stage of frog. ______.

Ans: tadpole

5. Technique in which the sperm and ova are fused in laboratoty under controlled conditions _______.

Ans: In vitro fertilization