Tag: evs

Questions Related to evs

Which pigment is absent in chloroplasts?

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

  1. Xanthophyll

  2. Anthocyanin

  3. Chlorophyll-b

  4. Carotene

Show answer
Correct Option: B
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'.

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

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

  1. Algae

  2. Fungi

  3. Protozoa

  4. Nematoda

Show answer
Correct Option: A
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'.

Haplontic life cycle generally occurs in ______________.

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

  1. most algae

  2. bryophytes

  3. pteridophytes

  4. gymnosperms

Show answer
Correct Option: A
Explanation:

Haplontic life cycle generally occurs in most algae such as volvox, Spirogyra and some species of Chlamydomonas.

So the correct option is A.

Diatomaceous earth is used for all except

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

  1. polishing

  2. filtration of offs and syrups

  3. making sound and fire proof rooms

  4. biogas production

Show answer
Correct Option: D
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".

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

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

  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

Show answer
Correct Option: C
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.

Photosynthetic pigments of Rhodophyceae (red algae) are

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

  1. chl a and b

  2. chl a and c, fucoxanthin

  3. chl a and d

  4. chl a, chl d and phycoerythrin

Show answer
Correct Option: D
Explanation:

The members of Rhodophyceae are commonly called red algae because of the predominance of the red pigment r-phycoerythin in their body. Apart from this, other major pigments found in them are chlorophyll a and chlorophyll d.

In Ulothrix, sexual reproduction is by

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

  1. isogamy

  2. anisogamy

  3. oogamy

  4. conjugation

Show answer
Correct Option: A
Explanation:

Isogamous type of sexual reproduction is found in Ulothrix and in majority, the plants are heterothallic. The gametes are found in large number, i.e. 32 to 64 in each gametangium.

Greatest producers of organic matter are

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

  1. Crop plants

  2. Forests

  3. Plants of the land area

  4. Phytoplankton of oceans

Show answer
Correct Option: D
Explanation:

The $CO _2$ present in the oceans in the form of dissolved gas or carbonates is estimated about 11.2 X {10}$^{14}$ tonnes which is more than 50 times of the amount present in the atmosphere.

Green plants fix about 70-80 billion tonnes of $CO _2$ annually by the process of photosynthesis. Out of total $CO _2$ fixed, 90% is fixed by water plants (mainly in oceans) than 10 % fixed by terrestrial plants.
Hence, the correct answer is 'Phytoplankton of oceans'.

Fill in the blank:

The member of our solar system, with highly tilted orbit, is ________.

evs our earth and the space asteroids, comets, and meteors and meteorites other objects in solar system asteroids, comets and meteors

  1. Earth

  2. Pluto

  3. Mars

  4. Saturn

Show answer
Correct Option: B
Explanation:

Pluto has a highly tilted orbit, about $17^0$. This strange orbit gives Pluto some unusual characteristics, sometimes bringing it within the orbit of Neptune.

Plutons are the members of solar system with highly titled orbits. This statement is

evs our earth and the space asteroids, comets, and meteors and meteorites other objects in solar system asteroids, comets and meteors

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Answer is A.

The planet Pluto and objects beyond it are called Plutons and they are the new members of the solar system. The order of the Plutons is Pluto, Charon and 2003 UB.
Plutons have highly tilted orbits and take more than 200 years to revolve the sun.
Hence, the statement is true.