Tag: microsporophyll vs megasporophyll

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Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. Apospory

  2. Apogamy

  3. Apomixis

  4. Parthenogenesis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Apogamy is the development of a sporophyte from the gametophyte without the fusion of gametes (syngamy).

Multiple choice microsporophyll vs megasporophyll plant kingdom biology
A translator consists of.

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

Karyogamy is?

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. One

  2. Two

  3. Many

  4. Zero
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In angiosperms, the male gametophyte (pollen grain) is highly reduced and does not contain prothallial cells, unlike the male gametophytes of gymnosperms or pteridophytes.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. Crassinucellate

  2. Tenuinucellate

  3. Resupinate ovule

  4. Protonucellate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A crassinucellate ovule is one in which the nucellus is massive and well-developed, typically resulting from the division of the primary parietal cell.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. Epigynous

  2. Perigynous

  3. Mesogynous

  4. Metagynous
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. Three

  2. Two

  3. One

  4. Zero
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Flowering plants (angiosperms) have a highly reduced male gametophyte that lacks prothallial cells entirely. This is a key difference from gymnosperms.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

Which one forms the male gametes in angiosperms?

  1. Antheridial cell

  2. Body cell

  3. Generative cell

  4. Tube cell
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the angiosperm male gametophyte, the generative cell undergoes mitosis to produce two male gametes (sperm cells).

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. Small

  2. With thin cytoplasm

  3. Nonvacuolate

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The male gamete in angiosperms is typically small, non-vacuolate, and contains a relatively thin cytoplasm compared to the large, nutrient-rich oosphere (egg cell). Since all these characteristics are accurate, the correct choice is all the above.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

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

  1. monocots

  2. dicots

  3. pteridophytes

  4. gymnosperms
Reveal answer Fill a bubble to check yourself
D Correct answer
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 ".