Cleavage involves repeated cell division without increase in size. But cells size decrease.
BIOXII01: REPRODUCTION IN ORGANISMS
341445
Animals in which development of zygote takes place outside the body of female parent and they lay fertilised unfertilised eggs are called
1 Oviparous
2 Viviparous
3 Ovoviviparous
4 Marsupials
Explanation:
egg laying animals are called oviparous.
BIOXII01: REPRODUCTION IN ORGANISMS
341446
Which of the following is a post-fertilisation event in flowering plants?
1 Transfer of pollen grains
2 Embryo development
3 Formation of flower
4 Formation of pollen grains
Explanation:
The sequence is as follows: formation of flower \(\rightarrow\) formation of pollen grains \(\rightarrow\) transfer of pollen grains \(\rightarrow\) fertilization \(\rightarrow\) Embryo development
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341447
Assertion : Every sexually reproducing organism, including human beings begin life as a single cell-the zygote. Reason : Zygote is the vital link that ensures continuity of species between organisms of one generation and the next.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are correct and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\).
Cleavage involves repeated cell division without increase in size. But cells size decrease.
BIOXII01: REPRODUCTION IN ORGANISMS
341445
Animals in which development of zygote takes place outside the body of female parent and they lay fertilised unfertilised eggs are called
1 Oviparous
2 Viviparous
3 Ovoviviparous
4 Marsupials
Explanation:
egg laying animals are called oviparous.
BIOXII01: REPRODUCTION IN ORGANISMS
341446
Which of the following is a post-fertilisation event in flowering plants?
1 Transfer of pollen grains
2 Embryo development
3 Formation of flower
4 Formation of pollen grains
Explanation:
The sequence is as follows: formation of flower \(\rightarrow\) formation of pollen grains \(\rightarrow\) transfer of pollen grains \(\rightarrow\) fertilization \(\rightarrow\) Embryo development
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341447
Assertion : Every sexually reproducing organism, including human beings begin life as a single cell-the zygote. Reason : Zygote is the vital link that ensures continuity of species between organisms of one generation and the next.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are correct and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\).
Cleavage involves repeated cell division without increase in size. But cells size decrease.
BIOXII01: REPRODUCTION IN ORGANISMS
341445
Animals in which development of zygote takes place outside the body of female parent and they lay fertilised unfertilised eggs are called
1 Oviparous
2 Viviparous
3 Ovoviviparous
4 Marsupials
Explanation:
egg laying animals are called oviparous.
BIOXII01: REPRODUCTION IN ORGANISMS
341446
Which of the following is a post-fertilisation event in flowering plants?
1 Transfer of pollen grains
2 Embryo development
3 Formation of flower
4 Formation of pollen grains
Explanation:
The sequence is as follows: formation of flower \(\rightarrow\) formation of pollen grains \(\rightarrow\) transfer of pollen grains \(\rightarrow\) fertilization \(\rightarrow\) Embryo development
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341447
Assertion : Every sexually reproducing organism, including human beings begin life as a single cell-the zygote. Reason : Zygote is the vital link that ensures continuity of species between organisms of one generation and the next.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are correct and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\).
Cleavage involves repeated cell division without increase in size. But cells size decrease.
BIOXII01: REPRODUCTION IN ORGANISMS
341445
Animals in which development of zygote takes place outside the body of female parent and they lay fertilised unfertilised eggs are called
1 Oviparous
2 Viviparous
3 Ovoviviparous
4 Marsupials
Explanation:
egg laying animals are called oviparous.
BIOXII01: REPRODUCTION IN ORGANISMS
341446
Which of the following is a post-fertilisation event in flowering plants?
1 Transfer of pollen grains
2 Embryo development
3 Formation of flower
4 Formation of pollen grains
Explanation:
The sequence is as follows: formation of flower \(\rightarrow\) formation of pollen grains \(\rightarrow\) transfer of pollen grains \(\rightarrow\) fertilization \(\rightarrow\) Embryo development
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341447
Assertion : Every sexually reproducing organism, including human beings begin life as a single cell-the zygote. Reason : Zygote is the vital link that ensures continuity of species between organisms of one generation and the next.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are correct and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\).
