Tag: microsporophyll vs megasporophyll

Questions Related to microsporophyll vs megasporophyll

Development of sporophyte/embryo from gametophytic tissue without fusion of gametes is?

microsporophyll vs megasporophyll plant kingdom biology

  1. Apospory

  2. Apogamy

  3. Apomixis

  4. Parthenogenesis

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Correct Option: B
A translator consists of.
microsporophyll vs megasporophyll plant kingdom biology

  1. A pollinium, a caudicle and a corpusculum

  2. Two pollinia, two caudicles and two corpuscula

  3. Two pollinia, two caudicles and one corpusculum

  4. Two pollinia and one corpusculum

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Correct Option: C
Explanation:

The translator is the special structure to aid the unique type of pollination mechanism of Asclepiads. It is present both in the Periplocoideae and in the Cynanchoideae. In these sub-families, it consists of the three parts which are corpuscular, pollinia or pollen and two caudicles. These are the structures of the attachment to stigma. Pollen carrier encloses the pollen grains. Caudicles are connective to attach the pollen mass with corpuscular.

Therefore option C is most suitable.

Option C is correct.

Karyogamy is?

microsporophyll vs megasporophyll plant kingdom biology

  1. Fusion of two germ cells

  2. Fusion of two gametic nuclei

  3. Fusion of a somatic cell and a reproductive cell

  4. Fusion of two somatic cells

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Correct Option: B
Explanation:

Karyogamy is the final step that is conducting the process of fusing two haploid eukaryotic cells together. It then refers specifically to the fusion of the two nuclei. For its occurrence, the cell membrane and cytoplasm of each cell must fuse by the process termed as plasmogamy. It is a common feature of all diploid organisms undergoing sexual reproduction.

Therefore the correct answer is option B.

Number of prothallial cells present in the male gametophyte of angiosperms is?

microsporophyll vs megasporophyll plant kingdom biology

  1. One

  2. Two

  3. Many

  4. Zero

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Correct Option: D

A primitive massive nucellus occurs in some ovules. The condition is called.

microsporophyll vs megasporophyll plant kingdom biology

  1. Crassinucellate

  2. Tenuinucellate

  3. Resupinate ovule

  4. Protonucellate

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Correct Option: A

If position of ovary is below sepals petals and stamens, the flowers is called 

microsporophyll vs megasporophyll plant kingdom biology

  1. Epigynous

  2. Perigynous

  3. Mesogynous

  4. Metagynous

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Correct Option: A
Explanation:

When calyx and corolla arise from upper side of ovary it is called epigyny, Ovary is inferior and flower is epigynous.

Number of prothallial cells present in male gametophyte of flowering plant is?

microsporophyll vs megasporophyll plant kingdom biology

  1. Three

  2. Two

  3. One

  4. Zero

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Correct Option: D

Which one forms the male gametes in angiosperms?

microsporophyll vs megasporophyll plant kingdom biology

  1. Antheridial cell

  2. Body cell

  3. Generative cell

  4. Tube cell

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Correct Option: C

As compared to oosphere, the male gamete of angiosperms is?

microsporophyll vs megasporophyll plant kingdom biology

  1. Small

  2. With thin cytoplasm

  3. Nonvacuolate

  4. All the above

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Correct Option: D

Plants of this group are diploid and well adapted to extreme conditions.They grow bearing sporophylls in compact structures called cones. The group-in reference is

microsporophyll vs megasporophyll plant kingdom biology

  1. monocots

  2. dicots

  3. pteridophytes

  4. gymnosperms

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Correct Option: D
Explanation:

The life cycle of gymnosperms have a dominant sporophyte and reduced gametophyte with the female gametophyte retained on the sporophyte. The male and female sex organs are formed in structures called cones or strobili. In gymnosperms both the sexes are separate. Meiosis occurs in both male and female strobili. 

So,the correct answer is "Gymnosperms ".