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Published on: 24/05/2021
QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks
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Questions + Answers key
Take MCQ Biology Test1.
Rearrange the various reproductive events in the correct order in which they occur in a flowering plant. Embryogenesis, gametogenesis, pollination, fertilisation.
2.
Identify the figure given below and mention the vegetative part that helps it to propagate.
3.
Although potato tuber is an underground part, it is considered as steam, why?
4.
Name the most common asexual, motile reproductive structure found in the members of kingdom-Fungi and Algae.
5.
Is the presence of large number of chromosomes in an organism a hindrance to sexual reproduction? Justify your answer by given suitable reason.
6.
Name the type of pollination in self-incompatible plants.
7.
Name the parts of the gynoecium which develop into fruit and seeds.
8.
Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowering plant:
Embryogenesis, Fertilisation
Gametogenesis, Pollination
9.
Between an annual and a perennial plant, which one has a shorter juvenile phase? Give one reason.
10.
Mention two inhercent characteristics of Amoeba and yeast that enable them to reproduce asexually.
1.
(a)
The correct order of the reproductive events is Gametogenesis, pollination, fertilisation, embryogenesis.
2.
( )
The figure is of ginger. The vegetative part that helps it to propagate is rhizome.
3.
( )
Potato tuber is considered as a stem because of the following reasons:
(i) The tuber has nodes and internodes which are parts of a stem.
(ii) Leafy shoots appear from the nodes.
4.
( )
The most common asexual reproductive structures in these organisms are zoospores. These are microscopic motile structures.
5.
( )
Large number of chromosomes are a hindrance to sexual reproduction because of following reasons:
1.Difficulty of zygotene stage formation in small space.
2. Accomodation problem of large number of bivalents over the equator
3. Disturbance in disjunction of so many homologous chromosomes.
4.Formation of large number of nonfunctional gametes.
6.
( )
Cross-pollination.
7.
( )
Ovary develops into fruit; ovules develop into seeds.
8.
( )
Gametogenesis \(\rightarrow\) Pollination \(\rightarrow\) Fertilisation \(\rightarrow\) Embryogenesis
9.
( )
An annual plant will have a shorter juvenile phase.
Since an annual plant completes its entire life cycle within a season, it has a shorter juvenile phase.
10.
( )
(i) Amoeba and yeast are single-called organisms.
(ii) They have a relatively simple organ-isation of cells.
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