Free Organisms And Populations (Daily Quiz: 8) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Which two of the following changes (1 to 4) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more)?

1. Increase in red blood cell size
2. Increase in red blood cell production
3. Increased breathing rate
4. Increase in thrombocyte count

The changes occurring are

(a) (C) and (D)

(b) (B) and (C)

(c) (A) and (D)

(d) (A) and (B)

Question-2

Body compensates for low oxygen availability at due to the altitudes sickness by

(a) decreasing binding affinity of haemoglobin

(b) increasing RBC

(c) increasing breathing rate

(d) All of the above

Question-3

Ratio between natality and mortality is called

(a) vital index

(b) population ratio

(c) density co-efficient

(d) census ratio

Question-4

Which of the following is a partial root parasite?

(a) Mistletoe

(b) Sandal wood

(c) Orobanche

(d) Ganoderma

Question-5

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example.

(a) Enlargement of body size by swallowing air in puffer fish

(b) Colour change in Chamaeleon

(c) Poison fangs in snakes

(d) Melanism in moths