NCERT NEET Botany Ecology online mock,model,grand,sample papers

Ecology Organism and Population Mock Test-8

Question No:1

Carrying capacity K means _______

[A] Organism’s capability of maximum reproduction
[B] Nature’s limit for supporting maximum growth of a species
[C] Nature’s limit for supporting maximum number of species
[D] Organism’s capability to withstand environmental odds

Question No:2

If a population grows in a habitat with limited resources, then following phases of achievement are observed

[A] Lag —> Acceleration —> Deceleration -»Asymptote
[B] Log —> Deceleration —> Acceleration —> Asymptote
[C] Log —> Acceleration —> Deceleration —> Asymptote
[D] Lag —> Acceleration —» Asymptote —» Deceleration

Question No:3

The sigmoid curve of population growth is also known as

[A] Wagner-Nelson logistic growth
[B] Lineweaver-Burk logistic growth
[C] Verhulst-Pearl logistic growth
[D] Darwin’s logistic growth

Question No:4

Which of the following equation correctly describes sigmoid growth curve?

[A] dN/dt = rN (\frac[{K-N}{r}]\)
[B] dN/dt =rN(\frac[{K-N}{t}]\)
[C] dN/dt = N (\frac[{K-N}{N}]\)
[D] dN/dt = rN(\frac[{K-N}{K}]\)

Question No:5

The reproductive fitness of a population in a certain habitat is also termed as ______

[A] Verhulst’s fitness
[B] Darwin’s fitness
[C] Lamarkian fitness
[D] Huxley’s fitness

Question No:6

In order to achieve maximum population in a habitat, which of the following is correct?

[A] High r value
[B] Low r value
[C] Independent of r value
[D] Optimum r value

Question No:7

The organism breeding only once in its lifetime is ______

[A] Atlantic tuna fish
[B] Indian pomphret fish
[C] Pacific salmon fish
[D] Arctic whale

Question No:8

Amongst plants, select the correct option which breeds only once in lifetime,

[A] Banyan
[B] Bamboo
[C] Oak
[D] Pine

Question No:9

______ is a more meaningful measure of population size.

[A] Natality
[B] Mortality
[C] Biomass
[D] Resources consumed

Question No:10

Pick out the essential resources for a population in a given habitat from the following Food, Water, Air, Space

[A] Food and water
[B] Food and Space
[C] Air and Space
[D] Water and Space

Question No:11

Nearly ______% of all insects are known to be phytophagous

[A] 25%
[B] 35%
[C] 45%
[D] 10%

Question No:12

Thorns are the most common morphological means of defense in

[A] Acacia
[B] Cactus
[C] Calotropis
[D] Both (a) and (b)

Question No:13

Which of the following weed plant produces cardiac glycosides (highly poisonous material)?

[A] Acacia
[B] Cactus
[C] Calotropis
[D] All

Question No:14

Which of the following substance are produced by plants as defense against grazers and browsers (count numbers)? Nicotine, Caffeine, Quinine, Strychnine, Opium

[A] 2
[B] 3
[C] 4
[D] 5

Question No:15

In a field experiment, when all the starfish were removed from an enclosed intertidal area more than ______(A)______ species of invertebrates become extinct within a year, because of ______(B)______ completion.

[A] A – 10, B – Intra-specific
[B] A-10, B-Inter-specific
[C] A – 20, B – Intra-specific
[D] A – 20, B – Inter-specific