Tag: biology

Questions Related to biology

Match the following.

Column (A) Column (B)
a. Kingdom (i) Pteridophyta
b. Subkingdom (ii) Plantae
c. Division (iii) Cryptogams
biology plant taxonomy nomenclature in classification introduction to plant kingdom history of classification

  1. a- i, b- ii, c- iii

  2. a- iii, b- i, c- ii

  3. a- ii, b- iii, c- i

  4. a- ii, b- i, c- iii

Show answer
Correct Option: C
Explanation:

Plantae is a kingdom, cryptogams is a subkingdom of planate. They include all non-flowering plants. Pteridophyta is a division of subkingdom cryptogams.

Therefore, the correct answer is option C.

  Organisms such as  plants that use light to make their own food are known as 

biology plant taxonomy nomenclature in classification introduction to plant kingdom history of classification

  1. Heterotrophs

  2. Photoautotrophs

  3. Symbionts

  4. Parasites

  5. Herbivores

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Correct Option: B
Explanation:
A. Heterotrophs are the organisms that feed on autotrophs or producers for their food.
B. Photoautotrophs are the organisms that use the light energy and convert it into chemical energy to make their food. For example, plants.
C. Symbionts are the organisms that form association with other organisms. The association may be commensalism, mutualism, parasitic etc.
D. Parasites are the organisms that live within or on an other organism which is called the host.
E. Herbivores are the primary consumers that feed directly on the producers (plants).
Hence organisms such as plants that use light to make their own food are known as photoautotrophs.
So, the correct answer is 'Photoautotrophs'.

Nature and properties of soil depends upon 

biology soil : our life soil properties soil - properties basics of soil pollution

  1. climate

  2. weathering process

  3. development of soil

  4. all of these

Show answer
Correct Option: D
Explanation:
Nature and properties of soil depends upon climate, weathering process and development of soil.
So, the correct option is 'all of these'

The pH of a fertile soil is usually around

biology soil : our life soil properties soil - properties basics of soil pollution

  1. 2-3

  2. 6-7

  3. 8-10

  4. 11-12

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Correct Option: B
Explanation:

Plants grow best in neutral or slightly acidic pH. Slight acidity favours tree growth and forms forests. Slight alkalinity is however, helpful in growth of grasslands and some crop plants like legumes. Hence, for most plants a pH value of 6 to 7 is favourable.

Soil salinity is measured by

biology soil : our life soil properties soil - properties basics of soil pollution

  1. Porometer

  2. Potometer

  3. Conductivity meter

  4. Calorimeter

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Correct Option: C

Solubility and availability of plant nutrients are more related to

biology soil : our life soil properties soil - properties basics of soil pollution

  1. Soil pH

  2. Soil porosity

  3. Soil temperature

  4. Soil colour

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Correct Option: B

Lime is added to soil which is

biology soil : our life soil properties soil - properties basics of soil pollution

  1. Sandy

  2. Alkaline

  3. Acidic

  4. Salty

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Correct Option: C
Explanation:
  • Lime is a valuable soil amendment that helps plants and lawns flourish by raising soil pH.
  • Most vegetables grow best in a slightly acidic to neutral soil, with a pH between 6.0 and 7.0 hence acidic soils having low pH is added with lime for raising its pH.
  • Hence Lime is added to soil which is acidic.
  • So, the correct answer is 'Lime'.

Salinity of the soil is often caused due to

biology soil : our life soil properties soil - properties basics of soil pollution

  1. Accumulation of soluble minerals near or in the surface in arid region

  2. Excessive addition of water

  3. Rapid,evaporation of surface water

  4. Excessive leaching

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Correct Option: A

Major use of petroleum is in

biology soil : our life soil properties soil - properties basics of soil pollution

  1. Industries

  2. Transport on land and air

  3. Factories

  4. Shipping

Show answer
Correct Option: B
Explanation:

Petroleum products are used as transportation fuels, fuel oils, for generation of electricity, road oils etc. major use of  petroleum is in transport.

So, the correct answer is 'Transport on land and air'

Pedology refers to study of

biology soil : our life soil properties soil - properties basics of soil pollution

  1. Soil

  2. Population

  3. Fossils

  4. Water

Show answer
Correct Option: A
Explanation:

Pedology refers to study of soil in their natural environment. Demography refers to study of human population. Paleontology refers to the study of fossils. Hydrology refers to the study of water.

Thus, the correct answer is 'Soil.'