Tag: basics of algae

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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.

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

Which pigment is absent in chloroplasts?

  1. Xanthophyll

  2. Anthocyanin

  3. Chlorophyll-b

  4. Carotene
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
 Xanthophyll It is a yellow colour pigment found in the stroma region of the chloroplast.
 Anthocyanin It is mainly found in the cell vacuole, especially in fruits and flowers.
 Chlorophyll - b It is a green colour pigment and found in the thylakoid region of the chloroplast.
 Carotene  It is an orange colour pigment and found in the stroma region of the chloroplast.

So, the correct answer is ' Anthocyanin'.

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

Which type of organism, live in the body of termites and digest wood cellulose converting it to soluble carbohydrates?

  1. Algae

  2. Fungi

  3. Protozoa

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

Algae are hte diverse group of aquatic organisms that have the ability to conduct photosynthesis.Certain algae are familiar to most people;for instance seaweeds, pond scum or the algal blooms in the lakes.

So, the correct option is 'Algae'.

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

Diatomaceous earth is used for all except

  1. polishing

  2. filtration of offs and syrups

  3. making sound and fire proof rooms

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

 The cell walls of diatoms are embedded with silica and thus the walls are indestructible. Thus, diatoms have left behind a large number of cell deposits in their habitat; this accumulation over billions of years is referred to as 'diatomaceous earth'. Being gritty this soil is used in polishing, filtration of oils and syrups.

So the correct option is "biogas production".

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

Eutely means ....................

  1. Variable muscle cells

  2. Variable locomotion

  3. Constant number of cells or nuclei in individuals of a species or in parts of their bodies

  4. Strictly marine nature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The constant number of cells or nuclei in individuals of a species or in parts of their bodies is known as eutely.

 The largest group of animals exhibiting eutely are the nematode worms, one of the largest of all animal phyla, and of great medical and agricultural importance as parasites of plants, animals, and humans. A plant that exhibits eutely is usually called a coenobium. Many species of semimicroscopic aquatic green algae exist as coenobia, such as the common Volvox and Pandorina.