Questions and answers
Class 12, Chapter 1 - Reproduction in organisms | NCERT
All questions and answers from this set. Asexual and sexual reproduction in organisms. Biology class 12 chapter 1 exercise mcq test and solutions.
Questions: 18
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Question 1
What is characteristic for asexual reproduction?
there is only single parent
Question 2
How do we call a period from birth to natural death of an organism?
life span
Question 3
Which statements are true?
In sexual reproduction gametes are mandatory.
True
Asexual reproduction is common among single-celled organisms.
True
Gametes are diploid cells.
False
Question 4
How do we call an organism that an exact copy of its parent?
a clone
Question 5
Match columns
zoospore
microscopic motile structures used in asexual reproduction
rhizome
main stem of the plant able to create new offspring
fragmentation
breaking body of organism into pieces that grow to adult forms
zygote
cell formed by a fertilization event between two gametes
homogametes
gametes similar in appearance
Question 6
Which statements are true?
There are no bisexual animals.
False
At the end of meiosis, only one set of chromosomes gets incorporated into each gamete.
True
In majority of organisms, male gametes are motile and female gamete is stationary.
True
Question 7
How do we call period of growth in animals?
juvenile phase
Question 8
Cyclical changes during reproduction in non-primate mammals is called:
oestrus cycle
Question 9
What is syngamy?
fusion of gametes
Question 10
What is parthenogenesis?
Process of development of gamete without fertilisation.
Question 11
Which statements are true?
In fsh, amphibians and majority of algae, external fertilisation occurs.
True
Usually, organisms that utilize external fertilisation, small numbers of gametes are being released.
False
Majority of plants utilize internal fertilisation.
True
Question 12
Characterize internal fertilisation process.
Those organisms release male gametes are
motile
and are released in big
numbers. Female gamete is considerably less
numerous.Question 13
Which processes are involved in embryogenesis?
mitosis
cell differentiation
Question 14
How many chromosomes are in human gamete?
23
Question 15
Which statements are true?
Meiocytes are diploid.
True
Chances of survival are greater in oviparous animals than in viviparous ones.
False
Question 16
Which animals are oviparous?
birds
reptiles
amphibians
Question 17
What is the name os structure where zygote is formed in flowering plants?
ovule
Question 18
Thick wall of a fruit is called:
pericarp