Tag: soil-nature

Questions Related to soil-nature

In the northern hemisphere, north-facing hillsides have a ____________ growing season than south-facing hillsides.

botany environmental factors soil-nature climate factors abiotic components

  1. Shorter

  2. Longer

  3. Up

  4. Down

Show answer
Correct Option: A

Ecotype is a type of species in which environmentally induced variations are

zoology environmental factors soil-nature climate factors abiotic components organisms and environment

  1. Temporary

  2. Genetically fixed

  3. Genetically not related

  4. None of the above

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Correct Option: B

Non living things in an environment is known as

zoology environmental factors soil-nature climate factors abiotic components organisms and environment

  1. Biotic Factors

  2. Abiotic Factors

  3. Biotic and abiotic factors

  4. All of above

Show answer
Correct Option: B

Which of the following is not properly matched?

zoology environmental factors soil-nature climate factors abiotic components organisms and environment

  1. Formaldehyde- Carcinogenic

  2. Sulphur dioxide - Respiratory problems

  3. Nitrogen oxide - Brown air

  4. Mean annual temperature - $25^o$C

  5. Photochemical smog - Grey air

Show answer
Correct Option: D
Explanation:

Mean annual temperature is calculated by subtracting the lowest recorded temperature from the highest recorded temperature of the of the day. It can vary depending on the weather and climate of an area.

A. Formaldehyde has been classified as cancer causing agent by the EPA. It has shown leukaemia incidences.
B. Sulphur dioxide is responsible for the respiratory tract diseases like asthma, bronchitis etc.
C. Nitrogen oxide is called the brown air because of the change in frequencies of absorption of light when nitrogen combines with the oxygen.
D. Mean annual temperature can vary depending on the weather and climatic conditions.
E. Photochemical smog forms grey air due to the formation of ozone and PAN that decreases the visibility.
Hence, the correct answer is 'Mean annual temperature - 25$^{o}$C'

In what way a plant growing on a forest floor is adapted for its survival?

zoology environmental factors soil-nature climate factors abiotic components organisms and environment

  1. Has shallow roots

  2. Requires low light

  3. Has a deep ta root

  4. Requires strong light

  5. Requires moist soil

Show answer
Correct Option: B
Explanation:

Plants growing on the forest floor (understorey) are adapted to lower Sunlight intensity or are shade loving. This is because, the dense canopy does not allow enough light to penetrate through and reach the forest floor. Light is the limiting factor for these plants and therefore, they are adapted to survive under low light conditions. Moisture availability and related adaptations are not of consideration. Thus, the correct answer is option B.

Choose the correct answers from the alternatives given .
Which of the following best describes strata ?

botany environmental factors soil-nature climate factors abiotic components

  1. Sedimentary rock layers that contain fossils

  2. Molten rock that contains radioactive material and is dangerous to the health of humans

  3. Sedimentary rock layers that all date from the same historical time

  4. All of the above

Show answer
Correct Option: A
Explanation:

Fossils are the remains of living creatures, both plants, and animals, or their tracks. These are found in sedimentary rock. Sedimentary rock is composed of strata. The term rock strata refer to stacked-up layers of sedimentary rock. Other kinds of rocks can have layering in them, but the word strata are reserved for sedimentary rocks - rocks composed of individual fragments of minerals or other rocks. 

So, the correct option is 'Sedimentary rock layers that contain fossils'.

The salinity of the oceans is

biology environmental factors soil-nature climate factors abiotic components

  1. Increasing

  2. Decreasing

  3. Constant

  4. Decreasing now out was Increasing In Past

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Correct Option: D

In most areas, the warmest time of the day about 5 feet above the ground occurs:

biology environmental factors soil-nature climate factors abiotic components

  1. Around noon

  2. In the afternoon between 3 and 5 PM

  3. In the early evening after 6 PM

  4. Just before the sun sets

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Correct Option: B

Suppose last night was clear and calm. Tonight low clouds will be present. From this you would conclude that tonight's minimum temperature will be:

biology environmental factors soil-nature climate factors abiotic components

  1. Higher than last night's minimum temperature

  2. Lower than last night's minimum temperature

  3. The same as last night's minimum temperature

  4. Above freezing

Show answer
Correct Option: A

Which of the following is present in maximum amount in atmosphere ____________.

biology environmental factors soil-nature climate factors abiotic components

  1. Oxygen

  2. Nitrogen

  3. Carbon dioxide

  4. Hydrogen

Show answer
Correct Option: B
Explanation:
78.03% of the atmosphere consists of Nitrogen. Some is being added to it through volcanic eruptions, erosion of sedimentary rocks and recycled through denitrification.
So, the correct answer is 'Nitrogen'