Tag: biology

Questions Related to biology

Water which contains contaminants is called as

biology wastewater story sewage treatment wastewater treatment - need and methods conservation

  1. Wates solution

  2. Waste water

  3. Portable water

  4. None of the above

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Correct Option: B

Waste water usually disposed in

biology wastewater story sewage treatment wastewater treatment - need and methods conservation

  1. water bodies

  2. underground

  3. forests

  4. wells

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Correct Option: A

Use of _______ helps in water purification.

biology wastewater story sewage treatment wastewater treatment - need and methods conservation

  1. Sodium

  2. Alum

  3. Chlorine

  4. Both B and C

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Correct Option: D
Explanation:

There are several source of water pollution like industrial effluents, sewage water, radiobiological pollutants etc. Alum is used to clarify water by coagulating soil or mud particles whereas chlorine makes water free from pathogenic bacteria.

For recycling the waster articles are sorted out by 

biology wastewater story sewage treatment wastewater treatment - need and methods conservation

  1. Rag picker

  2. Big Business men

  3. Both of them

  4. None

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Correct Option: A
Explanation:

Waste articles are sorted out by Rag pickers and then rag pickers sell the articles to the industries engaged in recycling. 

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.