The Life Cycle

01.
Reproduction is necessary to maintaining number of individuals and to prevent their
_________
(a) Death
(b) Diseases
(c) Extinction
(d) Population Explosion
02.
Changes in ecological system like varying temperature or water level or any astronomical
events can wipe out an entire species. However changing environment may be suitable
to some ________. So they survive and other individual perish.
(a) Mutants
(b) Individuals
(c) Variants
(d) Members
03.
In Asexual Reproduction, cell division takes place by ______
(a) Mutation
(b) Meiosis
(c) Mitosis
(d) Fertilization
04.
Name the following: A mode of asexual reproduction in which cell divides into two
equal parts and then each grow to full size
05.
Name the following: During unfavourable conditions, Amoeba covers itself by a covering
called cyst. Inside the cyst, cells divides into many cells. During favourable condition,
the cyst is broken and daughter cells are released. This mode of asexual reproduction
is called _____
06.
Find Odd one out:
Binary Fission
Fragmentation
Regeneration
Budding
Spore formation
Fertilization
07.
Fill in the Blank: New plants are produced from parts (roots, stems, leaves and
buds). New plants are similar. They take less time to grow, flower and bear fruits.
This mode of Asexual Reproduction is called ___________
08.
Fill in the Blank: Hyphae are thread-like structures. Spores are formed in __________.
When mature, they burst. When these spores land in the moist place, they germinate.
09.
Fill in the Blank: Animal Cloning is the process by which entire organism is reproduced
from a single cell taken from parent organism. Example is _________
10.
Advantage of Sexual Reproduction over Asexual Reproduction, is ______
(a) Fast Reproduction
(b) Only one parent required
(c) Scope of Variation
(d) No Specialized organs required
11.
Name the following: The process by which a Diploid (2n) cell halves the number of
chromosomes to give haploid (n) gametes
12.
Name the following: The process where male gamete (n) fuses with female gamete (n)
to give zygote (2n)
13.
True or False: Type of cells involved in Asexual reproduction are Germ cells
14.
Fill in the Blank: In sexual reproduction, the cell division is by _________ during
gametogenesis and by ________ after fertilization
15.
True or False: The nature of offspring is exactly same as that of parent in Sexual
Reproduction
16.
Fill in the Blank: Carpel is the female part at the centre of flower. It consists
of Stigma, Style and ___________
17.
Fill in the Blank: ______ is the Male part made up of Anther and Filament
18.
Fill in the Blank: The process of transfer of pollen grains from anther (male) to
____________ is called as pollination.
19.
Fill in the Blank: _____________ is the pollination of different flower of same
species.
20.
Find Odd one out:
Wind,
Honey-bee,
Butterfly,
Sunlight
21.
Name the following: The processes by which seed develops into seedling under appropriate
conditions.
22.
True or False: In Plants, after fertilization, Zygote develops into Seed
23.
Fill in the Blank: After fertilization, _____ develops into Fruit
24.
Find Odd one out:
Testes
Epididymis
Vas deferns
Oviducts
Penis
25.
Name the following: A passage through which sperm travels towards urethra.
26.
Fill in the Blank: Testes secrete the hormone __________ which bring about changes
in boys during puberty.
27.
Name the following: A strong muscular organ having the ability to expand and contract.
It can accomodate a growing foetus and can push a baby during labour. Name the organ
28.
Fill in the Blank: __________ secrete the hormone estrogen which bring about changes
in girls during puberty.
29.
True or False: At birth, ovary contains, just one egg.
30.
Fill in the Blank: All living organisms produce new individuals (new generation)
of the same species. This fundamental characteristic of living thing is known as

Answers:

01. (c) Extinction
02. (c) Variants
03. (c) Mitosis
04. Binary fission
05. Multiple fission
06. Fertilization { Rest all are modes of Asexual reproduction }
07. Vegetative propagation
08. Sporangium
09. Dolly sheep
10. (c) Scope of Variation
11. Meiosis
12. Fertilization
13. False { No Somatic cells are involved }
14. Meiosis, Mitosis
15. False { We find variations and diversity }
16. Ovary
17. Stamen
18. stigma (female)
19. Cross-Pollination
20. Sunlight { Rest all are agents of pollination }
21. Germination
22. False { No it develops into Embryo }
23. Ovary
24. Oviducts { Rest all are organs of male reproduction system }
25. Vas deferns
26. testosterone
27. Uterus
28. Ovaries
29. False { it contains 2 to 4 million eggs }
30. Reproduction