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Biology Exemplar
Class 12
NCERT Exemplar
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Chapter 1: Reproduction in Organisms
48 questions
Q1
Given below are a few statements related to external fertilisation.
I. The male and female gametes are formed and released simultaneously.
II. Only a few gametes are released into the medium.
III. Water is the medium in a majority of organisms exhibiting external fertilisation.
IV. Offspring formed as a result of external fertilisation have better chances of survival than those formed inside an organism.
Choose the correct statements.
I. The male and female gametes are formed and released simultaneously.
II. Only a few gametes are released into the medium.
III. Water is the medium in a majority of organisms exhibiting external fertilisation.
IV. Offspring formed as a result of external fertilisation have better chances of survival than those formed inside an organism.
Choose the correct statements.
Q2
The statements given below describe certain features that are observed in the pistil of flowers.
I. Pistil may have many carpels.
II. Each carpel may have more than one ovule.
III Each carpel has only one ovule.
IV. Pistil have only one carpel.
Choose the statements that are true from the options below.
I. Pistil may have many carpels.
II. Each carpel may have more than one ovule.
III Each carpel has only one ovule.
IV. Pistil have only one carpel.
Choose the statements that are true from the options below.
Q3
Which of the following situations correctly describe the similarity between an angiospermic egg and a human egg?
I. Eggs of both are formed only once in a lifetime.
II. Both the angiosperm egg and human egg are stationary.
III. Both the angiosperm egg and human egg are motile transported.
IV. Syngamy in both results in the formation of zygote.
Choose the correct answer from the options given below.
View all questionI. Eggs of both are formed only once in a lifetime.
II. Both the angiosperm egg and human egg are stationary.
III. Both the angiosperm egg and human egg are motile transported.
IV. Syngamy in both results in the formation of zygote.
Choose the correct answer from the options given below.
2
Chapter 2: Sexual Reproduction in Flowering Plants
52 questions
3
Chapter 3: Human Reproduction
48 questions
4
Chapter 4: Reproductive Health
37 questions
5
Chapter 5: Principles of Inheritance and Variation
52 questions
6
Chapter 6: Molecular Basis of Inheritance
71 questions
7
Chapter 7: Evolution
52 questions
8
Chapter 8: Human Health and Disease
70 questions
9
Chapter 9: Strategies for Enhancement in Food Production
77 questions
10
Chapter 10: Microbes in Human Welfare
59 questions
11
Chapter 11: Biotechnology: Principles and Processes
48 questions
12
Chapter 12: Biotechnology and its Applications
52 questions
13
Chapter 13: Organisms and Populations
70 questions
14
Chapter 14: Ecosystem
68 questions
15
Chapter 15: Biodiversity and Conservation
61 questions
16
Chapter 16: Environmental Issues
52 questions
Question
Easy
Solving time: 2 mins
The statements given below describe certain features that are observed in the pistil of flowers.
I. Pistil may have many carpels.
II. Each carpel may have more than one ovule.
III Each carpel has only one ovule.
IV. Pistil have only one carpel.
Choose the statements that are true from the options below.
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Text solution
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A pistil, (one a many carpels) has three parts, i.e., stigma, style and ovary. Ovary, the swollen part of the pistil contains an angiospermic, ovoid and whitish structure called ovule. Inside ovary it is attached to a parenchymatous cushion called placenta, either singly or in cluster.
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Practice more questions from Biology Exemplar (NCERT Exemplar)
Q1
Given below are a few statements related to external fertilisation.
I. The male and female gametes are formed and released simultaneously.
II. Only a few gametes are released into the medium.
III. Water is the medium in a majority of organisms exhibiting external fertilisation.
IV. Offspring formed as a result of external fertilisation have better chances of survival than those formed inside an organism.
Choose the correct statements.
I. The male and female gametes are formed and released simultaneously.
II. Only a few gametes are released into the medium.
III. Water is the medium in a majority of organisms exhibiting external fertilisation.
IV. Offspring formed as a result of external fertilisation have better chances of survival than those formed inside an organism.
Choose the correct statements.
Q2
The statements given below describe certain features that are observed in the pistil of flowers.
I. Pistil may have many carpels.
II. Each carpel may have more than one ovule.
III Each carpel has only one ovule.
IV. Pistil have only one carpel.
Choose the statements that are true from the options below.
I. Pistil may have many carpels.
II. Each carpel may have more than one ovule.
III Each carpel has only one ovule.
IV. Pistil have only one carpel.
Choose the statements that are true from the options below.
Q3
Which of the following situations correctly describe the similarity between an angiospermic egg and a human egg?
I. Eggs of both are formed only once in a lifetime.
II. Both the angiosperm egg and human egg are stationary.
III. Both the angiosperm egg and human egg are motile transported.
IV. Syngamy in both results in the formation of zygote.
Choose the correct answer from the options given below.
View allI. Eggs of both are formed only once in a lifetime.
II. Both the angiosperm egg and human egg are stationary.
III. Both the angiosperm egg and human egg are motile transported.
IV. Syngamy in both results in the formation of zygote.
Choose the correct answer from the options given below.
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| Question Text | The statements given below describe certain features that are observed in the pistil of flowers. I. Pistil may have many carpels. II. Each carpel may have more than one ovule. III Each carpel has only one ovule. IV. Pistil have only one carpel. Choose the statements that are true from the options below. |
| Updated On | Aug 2, 2022 |
| Topic | Reproduction in Organisms |
| Subject | Biology |
| Class | Class 12 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 169 |
| Avg. Video Duration | 7 min |
