Tag: biology

Questions Related to biology

Night recovery is caused by

transpiration major activities of living organisms biology

  1. Condensation of water vapours

  2. Local rain

  3. Capillary movement

  4. Both A and C

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Correct Option: A
Explanation:

During night, the dried soil surface becomes wet. This is due to the water droplets that forms a thin layer due to condensation. This is called as night recovery. As the soil surface cools at night by radiating its heat, water vapour present in the atmosphere condenses. This results in the formation of water droplets on the soil. At night as the air cools to the dew point, condensation occurs and soil becomes wet without rain.

Thus, the correct answer is option A. 

Choose the correct answers from the alternatives given.
The rate of transpiration in plants is more when

transpiration major activities of living organisms biology

  1. Atmosphere is dry

  2. Temperature is high

  3. Atmosphere is humid

  4. Atmosphere is dry and temperature is high

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Correct Option: D
Explanation:

Dry atmosphere means lack of moisture content in the air. Due to this, air has a lot of capacity to hold water and thus the rate of transpiration increases.

Similarly, high temperatures evaporate the water at a much higher rate thus again increasing the rate of transpiration. Humid atmosphere already contains a lot of moisture and can not hold more water and thus transpiration rate decreases.
Hence, the correct answer is 'Atmosphere is dry and the temperature is high'.

Choose the correct answers from the alternatives given.
Loss of water from the plants in the form of vapour state is known as

transpiration major activities of living organisms biology

  1. Guttation

  2. Imbibition

  3. Transpiration

  4. Translocation

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Correct Option: C
Explanation:

  • Water loss from the leaves in the form of water vapour through the openings called stomata is called transpiration.
  • Imbibition is a phenomenon that refers to the absorption of one substance by another, usually uptake of water by a plant or a seed.
  • Guttation is excretion of xylem sap on the tips of some plants through pores called hydathodes.
  • Translocation is the movement of the material from the source to sink inside the plant. Example, movement of starch from leaves to roots or other plant parts.
Hence, the correct answer is 'Transpiration'.

Kingdom Plantae includes

biology plant taxonomy life introduction to plant kingdom classification of organisms

  1. algae and bryophytes

  2. pteridophytes and gymnosperms

  3. angiosperms

  4. all of these

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Correct Option: D
Explanation:
The Plant Kingdom incorporates Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms. Bryophytes are creatures of land and water of plant kingdom. 
So, the correct option is 'all of these'.

Ferns can be classified as

biology plant taxonomy life introduction to plant kingdom classification of organisms

  1. Bryophyta

  2. Thallophyta

  3. Pteridophyta

  4. None of the above

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Correct Option: C
Explanation:

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta.

Algae mostly belongs to 

biology plant taxonomy life introduction to plant kingdom classification of organisms

  1. Thallophyta

  2. Bryophyta

  3. Pteridophyta

  4. Gymnosperm

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Correct Option: A
Explanation:

Anwer is A.

Plants that do not have well-differentiated body design are Thallophyta . They are commonly called algae.
Algae are chlorophyll-bearing, simple, thalloid, autotrophic and largely aquatic (both fresh water and marine) organisms.

Neem is classified under

biology plant taxonomy life introduction to plant kingdom classification of organisms

  1. Thallophyta

  2. Bryophyta

  3. Pteridophyta

  4. Angiosperms

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Correct Option: D
Explanation:

The answer is D. Angiosperms

Azadirachta indica, commonly known as neem, is a tree in the mahogany family Meliaceae. It is mostly used for medicinal purposes. 

Laminaria is classified as 

biology plant taxonomy life introduction to plant kingdom classification of organisms

  1. Thallophyta

  2. Bryophyta

  3. Pteridophyta

  4. None of the above

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Correct Option: A

Choose the correct answers from the alternatives given.
Which of the following kingdoms contains primarily multicellular, larger-celled, photosynthetic    organisms?

biology plant taxonomy life introduction to plant kingdom classification of organisms

  1. Animalia

  2. Plantae

  3. Archaea

  4. Fungi

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Correct Option: B
Explanation:

Kingdom Plantae includes all eukaryotic chlorophyllous autotrophic organisms that do photosynthesis and are multicellular with large sized cells.

Hence, the correct answer is 'Plantae'.

Which of the following statement is false?

biology evolution and biodiversity life introduction to plant kingdom classification of organisms

  1. Biological names are generally written in Latin and printed in italics.

  2. Both the words in biological name when handwritten are jointly underlined.

  3. In binomial system given by Linnaeus is being practised by biologists all over the world.

  4. In binomial system, first component a genus and second word is specific epithet.

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Correct Option: B
Explanation:

Option (B) is false.

Both the words in biological name is written in italics or underlined to denote a species that is to be denoted but not jointly underlined.