Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice solid waste management environmental management biology

Industrial waste needs to be treated _______.

  1. Scientifically

  2. Methodically

  3. Naturally

  4. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Industrial wast are very hazardous. They need to be handle with great care. They need to be treated scientifically.

Multiple choice solid waste management environmental management biology

Which of the following demonstrates the use of compost?

  1. Fodder

  2. Fertilizer

  3. Pesticide

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

Compost is an organic matter that has been decomposed for the better growth of crops. Compost is added to the soil so that the plants get sufficient nutrients from the soil. Composts are rich in nutrients.

So, the correct option is 'Fertilizer'.

Multiple choice biology natural resources- air, water and land soil - formation and profile soil-nature soil profile

The weathering of rocks is caused by 

  1. Wind, water and climate

  2. Only wind and clay

  3. Only wind and water

  4. Wind, water and gravel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Weathering is the breakdown of rocks through multiple physical and chemical processes. Wind causes physical abrasion, water contributes through erosion and chemical reactions, and climate (temperature variations, freezing-thawing) creates stresses that fracture rocks over time.

Multiple choice biology natural resources - air, water and land soil - formation and profile soil-nature soil profile

Deep black soil is considered to be highly productive due to high proportion of

  1. Silt and earthworm

  2. Clay and humus
  3. Gravel and $Ca^{++}$

  4. Sand and Zn
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Deep black soil (often called Regur or Black Cotton soil) is highly productive because it is rich in clay, which retains moisture, and humus, which provides essential nutrients for plant growth.

Multiple choice biology natural resources - air, water and land soil - formation and profile soil-nature soil profile

The top most layer of soil contains

  1. Humus, living organism and soil

  2. Human, living organism and plants

  3. Humans and soil particles

  4. Human and microorganism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The top most layer of soil is said to contain and support a lot of living organisms. It also has organic manure in it that supports the growth and development of plants. 

So, option a "Humus, living organisms and soil" is the correct answer.

Multiple choice biology natural resources - air, water and land soil - formation and profile soil-nature soil profile

Soil contain rock particles

  1. Water and plants

  2. Minerals, organic matter, air and water

  3. Air and plants

  4. Air, water and plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The soil is formed by weathering of rocks. It contains an organic material (dead decay of leaves and plants) called humus, which makes soil fertile, and mineral by the breakdown of rocks. It also contains soil and water. Thus, the correct option is B.
Multiple choice biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

Which of the following is a food synthesising tissue?

  1. Phloem

  2. Sclerenchyma

  3. Chlorenchyma

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

  • Phloem is also called as bast. 
  • These tissues in plants conduct foods made in the leaves to all other parts of the plant. 
  • Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibers, and phloem parenchyma cells.
  • Hence, Phloem is a food synthesizing tissue.

So, the correct answer is 'Phloem'.

Multiple choice biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

The movement of molecules in phloem is

  1. Unidirectional.

  2. Bidirectional.

  3. Non-directional.

  4. Sometimes unidirectional and sometimes bidirectional.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phloem is responsible for transport of food and minerals. Food synthesized in photosynthetic parts is translocated to nonphotosynthetic parts through the phloem. Phloem translocates organic substances and inorganic solutes first from leaves to all other parts of the plant and storage organs. Storage organs re-export organic nutrients to those parts which require the same as newly formed leaves and fruits i.e., it is bidirectional.

Thus, the correct answer is option B.