Tag: evs

Questions Related to evs

Cephaleuros, a parasite on tea plants belongs to ___________.

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Algae

  2. Fungi

  3. Bacteria

  4. Viruses

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Correct Option: A

Algae is characterized by the

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Green colour slippery appearance

  2. Spreads during rainy seasons

  3. Both A and B

  4. Heterotrophic

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Correct Option: C
Explanation:
  • Algae are eukaryotic organisms that have no roots, stems, or leaves but do have chlorophyll and other pigments for carrying out photosynthesis. Thus they are autotrophic.
  • Algae can be multicellular or unicellular and are characterized by the green colour slippery appearance and spread during rainy seasons.
  • So the correct option is C.

The family Ephedraceae, having ephedrine producing plants, belongs to _____________.

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Algae

  2. Bryophytes

  3. Gymnosperms

  4. Angiosperms

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Correct Option: A

Match List I(Plant groups) with List II(Botanists) and select the correct answer using the codes given the lists.

List-I List-II
a. Algae $1$. Kashyap
b. Hepatics $2$. Fr. Santapau
c. Fossial gymnosperms $3$. Iyengar
d. Angiosperms $4$. Sahni
evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. A-$3$, B-$1$, C-$4$, D-$2$

  2. A-$2$, B-$4$, C-$1$, D-$3$

  3. A-$3$, B-$4$, C-$1$, D-$2$

  4. A-$2$, B-$1$, C-$4$, D-$3$

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Correct Option: A

Algae have cells made up of.

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Cellulose, galactans and mannans

  2. Hemicellulose, pectins and proteins

  3. Pectins, cellulose and proteins

  4. Cellulose, hemicellulose and pectins

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Correct Option: A

Jhoomar has a water sample which has green colour scum over it. Which of the following microorganism can be observed in the given sample under a microscope?

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Algae

  2. Virus

  3. Bacteria

  4. None of the above

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Correct Option: A
Explanation:

  • One can clearly found algae in a waterbody as algae are found in a large range in aquatic habitats. 
  • They are able to prepare their own food by the process of photosynthesis by the help of chlorophyll which gives green colour to algae. 
  • Hence the green colour scum is visible over water bodies.
  • The correct answer is A. 

Which of the following helps in the breeding of mosquitoes?

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Algae growing in the pond

  2. Algae growing on the on wall

  3. Algae growing in the river

  4. None of the above

Show answer
Correct Option: A
Explanation:
Mosquitoes lay their eggs in standing water where the larvae hatch and feed before pupating and emerging as adults. The larvae come to the surface of the water to feed and breathe and then hide from predators under vegetation in your pond. Ponds can be an ideal breeding ground for mosquito larvae. The larva from the eggs feed on algae present in the pond.

So, the correct answer is 'A'.

Each cell of Volvox colony has a structure, similar to

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Ulothrix

  2. Spirogyra

  3. Chlamydomonas

  4. Nostoc

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Correct Option: C
Explanation:

Volvox is colonial green alga. The cells are like unicellular alga Chlamydomdnas and are definitely organised in the form of a colony called coenobium. The coenobia of Volvox are largest, highly differentiated and well evolved among motile forms. Each coenobium is motile, the movement is brought about by the joint action of the flagella of individual cell.

What are algae helpful for?

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Turbidity

  2. Hydrography

  3. Self Purification

  4. Decomposition

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Correct Option: C
Explanation:

Algae have become significant organisms for self purification of wastewater since they are able to accumulate plant nutrients, heavy metals, pesticides, organic and inorganic toxic substances and radioactive matters in their cells or bodies.

Therefore C is the correct option. 

Identify the non embryonic plant.

evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

  1. Spirogyra

  2. Ulva

  3. Ulothrix

  4. All of these

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Correct Option: D
Explanation:

Non-embryonic plants are included under the division Thallophyta. In non-embryonic plants, the zygote or the fertilized egg does not form the embryo. It directly forms a new plant. It mainly includes algae such as Spirogyra, Ulothrix, and Ulva. Hence, all the given options are correct.