Tag: angiosperms

Questions Related to angiosperms

Endosperm cell of an angiosperm has $24$ chromosomes. The number of chromosomes in the gametes would be.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $8$

  2. $16$

  3. $24$

  4. $48$

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Correct Option: A

In angiosperms, a mature male gametophyte is formed from a pollen mother cell through.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Two meiotic divisions

  2. Three mitotic divisions

  3. One meiotic and two mitotic division

  4. A single meiotic division

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Correct Option: C
Explanation:

Meiosis produces pollen grain. Its cell divides mitotically to form generative nucleus and tube cell. The generative nucleus undergoes another mitosis to form two male gametes.

So, the correct answer is 'One meiotic and two mitotic division'

In angiosperms, formation of two male gametes from a pollen grain involves - divisions.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. One mitotic and one mitotic

  2. Two meiotic and two mitotic

  3. Only two mitotic

  4. Only two meiotic

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Correct Option: C

A natural sequence of developmental stages in the life cycle of an angiosperm is?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Cleavage $\rightarrow$ Fertilization $\rightarrow$ Differentiation $\rightarrow$ Fruit formation

  2. Pollination $\rightarrow$ Fertilization $\rightarrow$ Seed formation $\rightarrow$ Germination

  3. Germination $\rightarrow$ Double fertilization $\rightarrow$ Endosperm formation $\rightarrow$ Seed dispersal

  4. Maturation $\rightarrow$ Mitosis $\rightarrow$ Differentiation $\rightarrow$ Fertilization

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Correct Option: B

Centrospermae is regarded a natural order of angiosperms. All except two of its families contain the pigments that are collectively called battalions. Some of the families of the order are enumerated below. Which two families lack betalains?
a. Amaranthaceae
b. Aizoaceae
c. Chenopodiaceae
d. Caryophyllaceae
e. Mouginaceae
Select the correct answer using the codes given.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $1$ and $2$

  2. $2$ and $3$

  3. $3$ and $4$

  4. $4$ and $5$

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Correct Option: A

The male germ unit(MGU) in angiosperms comprises of __________________.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Vegetative nucleus and the generative cell

  2. The two sperm cells

  3. Vegetative nucleus and one of the sperms

  4. Vegetative nucleus arid the two sperms

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Correct Option: A

In angiosperms, which one of the following processes does NOT involve an unequal division?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Formation of microspores

  2. Formation of generative cell

  3. Zygotic embryogenesis

  4. Helobial endosperm development

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Correct Option: A

In angiosperms during development of embryo, the suspensor cell develops from.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Oospore

  2. Integument

  3. Endosperm

  4. Cotyledon

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Correct Option: A

Which one induces agamospermy in Apple?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Hormones

  2. Low temperature

  3. Cross pollination

  4. Self pollination

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Correct Option: A

In an angiosperm, a female plant having $2n=24$ is crossed with a male plant having $2n=12$. What will be the chromosome number of endosperm.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $12$

  2. $18$

  3. $24$

  4. $30$

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Correct Option: D