Free Organisms And Populations (Monthly Quiz: 2) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Ecotone is

(a) The bottom of a lake

(b) A polluted area

(c) A zone of transition between two communities

(d) A zone of developing community

Question-2

Soil water available to roots is

(a) surface water

(b) gravitational water

(c) hygroscopic water

(d) capillary water

Question-3

Choose the incorrect statement.

(a) The more dissimilar the niches of two species the stronger is their competition

(b) Two closely related species may not live in same habitat

(c) Two species cannot occupy the same niche in geographical area

(d) Two species may occupy the same ecosystem

Question-4

The most important factor which determined the increase inhuman population in India during the 20th century

(a) Mortality

(b) Natality

(c) Immigration

(d) Emigration

Question-5

A mutually beneficial association necessary for survival of both partners is

(a) commensalism

(b) mutualism/symbiosis

(c) amensalism

(d) both a and b.

Question-6

Which of the natural habitat on earth is inhabited just by a single species?

(a) Forest

(b) Hot vents

(c) Polar region

(d) None of these

Question-7

The sun loving plants are referred to as

(a) Heliophytes

(b) Halophytes

(c) Heterotrophs

(d) Sciophytes

Question-8

Mycorrhiza is an example of

(a) ectoparasitism

(b) symbiotic relationship

(c) endoparasitism

(d) decomposers.

Question-9

Choose the incorrect statement.

(a) Majority of the parasites harm the host and reduce the population density

(b) Parasite might render the host more vulnerable to predation by making it physically weak

(c) Ideal parasite should be able to thrive within host without harming it

(d) Malarial parasite does not need a vector (mosquito) to spread to other host

Question-10

Seals have a thick layer of fat (blubber) below their skin that acts as an

(a) capacitor

(b) thermostat

(c) resistor

(d) insulator

Question-11

An interaction where one species is harmed while the other is unaffected is called

(a) competition

(b) commensalism

(c) amensalism

(d) parasitism

Question-12

Read the following statements.

1. In a population, birth rate and death rate refer to per capita births and deaths, respectively.
2. In nature, we rarely find isolated single individuals of any species.
3. The size of population for any species is stable phenomena.
4. Ecological effects of any factors on a population growth are generally reflected in its size/population density.

Choose the correct statements.

(a) II and III

(b) I and II

(c) I, II and III

(d) I, II and IV

Question-13

Example of brood parasitism

(a) Crow and parrot

(b) Cuckoo (koel) and crow

(c) Parrot and pigeon

(d) Koel and parrot

Question-14

Which part of the world has a high density of organisms?

(a) Tropical rain forests

(b) Deciduous forests

(c) Grasslands

(d) Savannahs

Question-15

Which plant is pollinated by the below insect?

(a) Fig flower

(b) Orchid flower

(c) Sunflower

(d) Lotus flower

Question-16

Gause’s principle of competitive exclusion states that :

(a) competition for the same resources excludes species having different food preferences.

(b) more abundant species will exclude the less abundant species through competition.

(c) no two species can occupy the same niche indefinitely for the same limiting resources.

(d) larger organisms exclude smaller ones through competition.

Question-17

The term ‘precipitation’ includes

(a) snow

(b) rain

(c) hails

(d) all forms of water that fall to the ground.

Question-18

Animals that can tolerate a narrow range of salinity are

(a) stenohaline

(b) anadromous

(c) euryhaline

(d) catadromous

Question-19

Match the following columns.

Column I(Attributes of population growth)	Column II(Features)
A. Mortality	1. Individuals of same species going out from population.
B. Immigration	2. Individuals of same species coming in population.
C. Emigration	3. Numbers of deaths in population during given period.

Codes A B C

(a) 2 3 1

(b) 1 3 2

(c) 3 2 1

(d) 2 1 3

Question-20

According to Darwin which competition is a potent force in organic evolution?

(a) Intra-specific

(b) Inter-specific

(c) Both (a) and (b)

(d) None of these