Consider statements about ecology: 1. A population consists of individuals of the same species. 2. A community consists of interacting populations. 3. An ecosystem consists of biotic and abiotic components. Which are correct? MCQ with Answer and Explanation

Question

Consider statements about ecology: 1. A population consists of individuals of the same species. 2. A community consists of interacting populations. 3. An ecosystem consists of biotic and abiotic components. Which are correct?

A. 2 and 3 only

B. 1 and 3 only

C. 1, 2 and 3

D. 1 and 2 only

Answer: Option C

Solution (By JKSSB Mock Tests)

A population is a group of individuals of the same species living in a specific geographic area and capable of interbreeding. A community comprises all the interacting populations of different species (plants, animals, microbes) living together in a defined area. An ecosystem is a functional unit of nature that encompasses both the biotic (living community) and abiotic (non-living physical environment like soil, water, sunlight) components, interacting as a complex system. All statements are correct.

This question belongs to: Science Biology

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1

Share Report

Marasmus is a disease of severe malnutrition characterized by:

A. Bone deformities

B. Overall wasting of body tissues and severe calorie-protein deficiency

C. Bleeding gums

D. Edema and fatty liver

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
Marasmus is a form of severe malnutrition caused by a deficiency of both calories and protein. It results in extreme wasting of muscle and subcutaneous fat, making the child look emaciated or 'wasted'. Unlike kwashiorkor, marasmus typically does not present with edema. The child is extremely weak, has a 'old man' face, and is highly susceptible to infections.

This question belongs to: Science Biology

Question #2

Share Report

The basic structural and functional unit of the nervous system is:

A. Axon

B. Nephron

C. Neuron

D. Dendrite

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
The neuron is the nerve cell, the fundamental unit of the nervous system, responsible for receiving, processing, and transmitting electrochemical signals. It consists of a cell body (soma), dendrites, and axon. Axon and dendrite are parts of a neuron. Nephron is the unit of kidney. Neurons communicate via synapses using neurotransmitters.

This question belongs to: Science Biology

Question #3

Share Report

Abscisic acid (ABA) is often called the 'stress hormone' because it:

A. Promotes seed germination

B. Accelerates fruit ripening

C. Promotes cell division

D. Induces stomatal closure during water stress

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Abscisic acid (ABA) is known as the stress hormone because it plays a crucial role in plant responses to environmental stresses, particularly drought. It induces the closure of stomata to reduce water loss (transpiration) and also inhibits seed germination and growth, helping the plant survive adverse conditions.

This question belongs to: Science Biology

Explore All Biology MCQs