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Test: Nutrition in Plants- 1 - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Nutrition in Plants- 1

Test: Nutrition in Plants- 1 for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Nutrition in Plants- 1 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Nutrition in Plants- 1 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Nutrition in Plants- 1 below.
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Test: Nutrition in Plants- 1 - Question 1

Through which part of the plant does carbon dioxide enter the leaves?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 1

Stomata are small openings on the surface of leaves that allow gases such as carbon dioxide to enter. These openings are crucial for photosynthesis.

Test: Nutrition in Plants- 1 - Question 2

What are the organisms called that synthesize their food from inorganic materials?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 2

Autotrophs are organisms that can produce their own food using light, water, carbon dioxide, or other chemicals. This group includes all plants and some bacteria.

Test: Nutrition in Plants- 1 - Question 3

Which of the following is a parasite?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 3

Cuscuta, or dodder plant, is a parasitic plant that derives its nutrition by attaching to other plants. It lacks chlorophyll and depends entirely on the host plant for nutrients.

Test: Nutrition in Plants- 1 - Question 4

What kind of plants are called saprotrophs?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 4

Saprotrophs are organisms that decompose and absorb nutrients from dead and decaying organic matter. This group primarily includes fungi and some bacteria.

Test: Nutrition in Plants- 1 - Question 5

What is nitrogen fixed by in the soil to become usable for plants?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 5

Certain bacteria, particularly those associated with the roots of leguminous plants, fix atmospheric nitrogen into a form that plants can use as a nutrient.

Test: Nutrition in Plants- 1 - Question 6

What do guard cells do?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 6

Guard cells are specialized cells in the epidermis of leaves that control the opening and closing of stomata, thus regulating gas exchange and transpiration in plants.

Test: Nutrition in Plants- 1 - Question 7

What is the main product of photosynthesis?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 7

The main product of photosynthesis is glucose, a simple sugar that provides energy and the starting material for other organic compounds in plants.

Test: Nutrition in Plants- 1 - Question 8

Which mineral is essential for the synthesis of proteins in plants?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 8

Nitrogen is a vital element in amino acids, the building blocks of proteins. It is essential for the growth and development of plants.

Test: Nutrition in Plants- 1 - Question 9

What is transpiration?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 9

Transpiration is the process by which water is lost from the plant mainly through the stomata in the leaves. It helps in nutrient transport and temperature regulation.

Test: Nutrition in Plants- 1 - Question 10

What type of relationship do Rhizobium bacteria and leguminous plants have?

Detailed Solution for Test: Nutrition in Plants- 1 - Question 10

Rhizobium bacteria and leguminous plants have a symbiotic relationship where the bacteria fix nitrogen from the air into a form usable by the plant, while the plant provides nutrients and a home for the bacteria.

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