Tag: evs

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Questions Related to evs

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

Algae is characterized by the

  1. Green colour slippery appearance

  2. Spreads during rainy seasons

  3. Both A and B

  4. Heterotrophic
Reveal answer Fill a bubble to check yourself
C Correct answer
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.
Multiple choice evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

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

  1. Algae

  2. Bryophytes

  3. Gymnosperms

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

Ephedra is a well-known gymnosperm plant that produces ephedrine, an alkaloid commonly used as a stimulant and decongestant. Gymnosperms are seed-producing plants that lack flowers, placing Ephedraceae in this botanical classification rather than angiosperms or lower plants.

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

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
  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-$3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Matching the botanists to their fields: Algae (Iyengar), Hepatics (Kashyap), Fossil gymnosperms (Sahni), and Angiosperms (Fr. Santapau). This corresponds to A-3, B-1, C-4, D-2.

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

Algae have cells made up of.

  1. Cellulose, galactans and mannans

  2. Hemicellulose, pectins and proteins

  3. Pectins, cellulose and proteins

  4. Cellulose, hemicellulose and pectins
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cell wall of algae is typically composed of cellulose, along with other polysaccharides like galactans and mannans. This composition varies by species but is the standard textbook description.

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

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?

  1. Algae

  2. Virus

  3. Bacteria

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 

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

Which of the following helps in the breeding of mosquitoes?

  1. Algae growing in the pond

  2. Algae growing on the on wall

  3. Algae growing in the river

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

Each cell of Volvox colony has a structure, similar to

  1. Ulothrix

  2. Spirogyra

  3. Chlamydomonas

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

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

What are algae helpful for?

  1. Turbidity

  2. Hydrography

  3. Self Purification

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

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

Identify the non embryonic plant.

  1. Spirogyra

  2. Ulva

  3. Ulothrix

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
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.