Plant life Questions with solutions MCQs

1. Which of the following processes helps in transportation of minerals from soil to al the parts of the plants?

A

Respiration

B

Imbibiton

C

Transpiration

D

Translocation

Plant life General Science
Correct Answer : C
Explanation :

Transpiration helps to transport minerals from the soil to all parts of the plants.

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2. Which of the following is non essential element in plants?

A

Iron

B

Boron

C

Sulphur

D

Cadmium

Plant Life General Science
Correct Answer : D
Explanation :

An element is said to be essential for plants if plants cannot complete their life cycle without that element, and this element directly involved in some many functions of plants

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3. Loss of water from tip of leaves is

A

Transpiration

B

Guttation

C

Bleeding

D

Respiration

Plant Life General Science
Correct Answer : B
Explanation :

Guttation is the process of exudation of water droplets from the tips of leaves in vascular plants through special pores called hydathodes. Therefore, the loss of water from the tips of leaves is called guttation.

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4. The macronutrient needed for plants is

A

Copper

B

Iron

C

Zinc

D

Potassium

Plant Life General Science
Correct Answer : D
Explanation :

There are 7 essential plant nutrient elements defined as micronutrients boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl).
Macronutrients are essential for plant growth and a good overall state of the plant. The primary macronutrients are Nitrogen (N), Phosphorus (P), and Potassium (K). Nitrogen is essential for plant development, since it plays a fundamental role in energy metabolism and protein synthesis

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5. What is the exudation of drops of xylem sap on the tips or edges of vascular plant leaves?

A

Adhesion

B

Cohesion

C

Imbibition

D

Guttation

Plant Life Health Educator set 1
Correct Answer : D
Explanation :

Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses, and a number of fungi. Guttation is not to be confused with dew, which condenses from the atmosphere onto the plant surface.

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6. Indole-3-acetic acid (IAA), a Plant Growth Regulator (PGR) is also called ________.

A

Auxin

B

Gibberellins

C

Ethylene

D

Cytokinins

Plant Life Health Educator Set 2
Correct Answer : A
Explanation :

Indole-3-acetic acid (IAA) is the most common plant hormone of the auxin class and it regulates various aspects of plant growth and development. Thus, the terms “auxin” and “IAA” are occasionally used interchangeably.

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7. Plants absorb most of the water needed by them through their

A

Embryonic zone

B

Zone of elongation

C

Root hairs

D

Growing point

Plant Life Accounts Assistant LAHDC
Correct Answer : C
Explanation :

While plants can absorb water through their leaves, it is not a very efficient way for plants to take up water. If water condenses on the leaf during high humidity, such as fog, then plants can take in some of that surface water. The bulk of water uptake by most plants is via the roots.

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