Tag: biology

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Questions Related to biology

Multiple choice biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

Polar bears live at

  1. Both North and South Poles

  2. South Pole only

  3. North Pole only

  4. Both Polar regions as well as several forests
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Polar bears are large, white bears that like cold climates, fatty meals and long days of hunting. No matter how adorable polar bears look, these animals are not cuddly. In fact, polar bears are ferocious hunters, and they are the biggest carnivores among land animals. Polar bears live in countries that ring the Arctic Circle: Canada, Russia, the United States (in Alaska), Greenland and Norway.  In the winter, temperatures in the Arctic are usually around minus 29 degrees Fahrenheit (minus 34 degrees Celsius) and can reach as low as minus 92 F (minus 69 C). The temperature of the water is frigid, as well, reaching as low as 28 F (minus 2 C), the freezing point of seawater. 

So the correct option is 'north pole only'.

Multiple choice biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

In which plant heterophyllous development does not occur due to environment?

  1. Coriander

  2. Cotton

  3. Larkspur

  4. Buttercup

  5. Canary grass
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation
Plants shows different kinds of structure in response to the environment during their development. This is called as plasticity. For example, heterophyllous development occurs in cotton, coriander and larkspur. In these plants, leaves of the young plants are different in shape than the leaves of mature plants. Buttercup also shows plasticity. In this, the shape of leaves is different in air and in water.
Thus, the correct answer is option E.
Multiple choice biology animal world oviparous and viviparous diversity and classification in animals adaptations in animals

The seral communities developing on a water body are known as

  1. Hydrosere

  2. Hydrophyte

  3. Hydrosphere

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

A;Hydrosere - Plant succession occurs in water bodies is called Hydrosere.

B.Hydrophyte - Plants grow in water related areas.
C.Hydrosphere - The area, in which water is present.
D.Hydrological cycle - Cyclic movement of water in nature is called Hydrological cycle
So, the correct option is 'Hydrosere'.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Manure helps in

  1. Enriching soil with nutrients

  2. Organic matter

  3. Increasing soil fertility

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of microorganism and used as fertilizers because it contains nutrients such as nitrogen, that is trapped by bacteria in the soil. Manure helps in enriching the soil with nutrients and organic matter and increasing soil fertility.

Thus, the correct answer is option D.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Choose the correct options from the following.
Advantage of fertilizers is/are

  1. They are nutrient specific and required in small amounts.

  2. They are water soluble and absorbed by the plant easily.

  3. They are easy to store and transport.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertilizers are chemically synthesized substances which are rich in plant nutrients such as NPK. They have a rapid response on application. Overuse of fertilizers can cause negative effects like decreased soil fertility, bioaccumulation etc.Although, it is very advantageous as they are nutrient specific and are required in small amounts, they are water soluble and absorbed by the plant easily and are easy to store and transport.

Thus, the correct answer is option D.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Choose the correct options from the following that describe the disadvantage of using manure

  1. They have less amount of nutrients as compared to fertilizers.

  2. Manures are bulky and can't be easily stored or transported.

  3. Both A and B

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

Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of microorganism and used as fertilizers. Disadvantages of a manure are that they have less amount of nutrients as compared to fertilizers, manures are bulky and not easy to store and transport.

Thus, the correct answer is option C.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizers contain a much higher amount of ___________ in comparison to what they use.

  1. Nutrients

  2. Micro-organisms

  3. Earthworms

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fertilizers, chemically synthesized substances which are rich in plant nutrients such as NPK. These artificially used substances are used in very small amount but have a rapid response. But, overuse of fertilizers can cause negative effects such as decreased soil fertility. 

Thus, the correct answer is option A.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizers supply

  1. Nitrogen

  2. Phosphorus

  3. Potassium

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertilisers, chemically synthesized substances which are rich in plant nutrients such as NPK. Fertilizers supply nitrogen, phosphorus and potassium. They are artificially made but have a rapid response. Overuse of fertilisers can cause negative effects like loose soil fertility.