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You need to login to ask any Questions from chapter organisms-and-populations of Biology-MCQS

Chapter:

organisms-and-populations

1. In which of following phase do organisms in a population multiply at a faster rate?

Deceleration phase Stationary phase Exponential phase Log phase

Log phase

The organisms multiply at a faster rate in log phase. It is second phase of sigmoid (logistic) growth curve. And maximum growth of population is observed in this phase.

Hint Answer

2. Which of following is not a factor that would limit growth of a population?

Food shortage Immigration Disease Famine

Immigration

Immigration is entry of individuals into a region for permanent or temporary settlement reby increasing population density of that particular region due to addition of individuals. Food shortage, disease and famine are factors that would limit growth of a population.

Hint Answer

3. The correct sequence of growth, curve for bacteria is

Lag, log, stationary and decline Lag, log, decline and stationary Stationary, lag, log, decline Decline, lag and log phase

Lag, log, decline and stationary

The graphical representation of growth of bacteria is Ascending straight line. It shows Lag, log, decline and stationary stage.

So, correct option is ?Lag, Log, decline and stationary?.

Hint Answer

4. In which of following interaction, an association between species is not obligatory but both species are benefited?

Mutualism Proto cooperation Commensalism Predation

Proto cooperation

Commensalism is an interaction in which association between species is not obligatory but both species are benefited. It is a long-term relationship between two species in which one species derives benefit while or is neir harmed nor benefited.

Hint Answer

5. Pitcher plant is

Herbivorous Carnivorous Saprotroph All of the above

Carnivorous

The pitcher plant is carnivores which having varied leaves (a deep cavity filled with digestive liquid) for trapping prey like insects. It is an act of capturing, killing and eating. Such plant traps insects to fulfil ir nitrogen requirement. Whereas herbivorous is organisms that feed plants only and saprotroph feed dead and decaying matter.

So correct answer is B.

Hint Answer

6. What is population having same number of individuals in pre-reproductive post-reproductive age called?

Growing population Reproductive population Steady population Declining population

Steady population

The population has same number of individuals in pre-reproductive post-reproductive age is called a steady population. It is population in which birth rate is approximately equal to death rate.

Hint Answer

7. Match following and select correct combination from given options.

Column I
(Population interaction)
Column II
(Examples)

A. Mutualism (i) Tick on dogs
B. Commensalism (ii) Balanus and Chathamalus
C. Parasitism (iii) Sparrow and any seed
D. Competition (iv) Epiphyte on a mango branch
E. Predation (v) Mycorrhiza

A ? (i), B ? (v), C ? (i v), D ? (i i i), E ? (i i)

A ? (i i), B ? (i), C ? (v), D ? (i v), E ? (i i i)

A ? (i i i), B ? (i i), C ? (i), D ? (v), E ? (i v)

A ? (v), B ? (i v), C ? (i), D ? (i i), E ? (i i i)

$A ? (v), B ? (i v), C ? (i), D ? (i i), E ? (i i i)$

(i) Ticks on dogs- The ticks present on dogs body are to suck blood which acts source of nutrition for m in which ticks act as a parasite while dogs hosts.hence it shows parasitism

(ii) Balanus and chathamalus- Balanus outcompetes chthamalus by crowding bt chthamalus occurs in high tide levels were balanus cannot where both balanus and chthamalus are species of barnacle. It shows competition within species.

(iii) Sparrow and any seed- sparrow or in that case any granivores whose preys are seed or grains preadte on plants thus leading to plant-animal interaction thus performing predatorship. It shows predation .

(iv) Epiphyte on mango branch- epiphyte are plants which which grow on or plants leaving host unaffected by its present here epiphyte such as orchids grown on mango plant where it is neir harmed nor benefitted .It shows commensalism.

(v) Mycorrhiza- It is association between fungus and roots of vascular plants where both are benefited equally none of m is harmed.This is an example of mutualism or symbiotic association.

so correct ans is ' D A-(v),B-(iv),C-(i),D-(ii),E-(iii)

Hint Answer

8. Define life span of an organism. Mention life span of (i) crocodile (ii) crow (iii) parrot & (iv) butterfly.

The life span of an organism is period from birth to natural death of individual.
The life span of :

(i) Crocodile is 60 years

(ii) Crow is 15 years

(iii) Parrot is 140 years

(iv) A butterfly is 1-2 weeks.

Hint Answer

9. Which kind of interaction, species A is showing with species B, C and D:-

Mutualism Proto-coperation Parasitism Commensalism

Mutualism

Mutualism is kind of interspecific interaction in which two or more organisms that live toger and are dependent on each or. These organisms provide mutual benefits to each or. Hence, in this interspecific interaction, both organisms benefit and it is often depicted as a (+/+) relationship or interaction.

So, correct answer is 'Mutualism'.

Hint Answer

10. Which of following formula correctly defines growth rate (GR)?

GR = $\frac{Natality – Mortality}{Unit time}$
GR = $\frac{Natality – Natality}{Unit time}$
GR = $\frac{Mortality – Natality}{Unit time}$
GR = $\frac{Mortality – Mortality}{Unit time}$

GR = $\frac{Natality – Mortality}{Unit time}$

The growth rate. It is increase in population due to an actual number of individuals added to population. Usually in India, growth rate is calculated every 10 years.

Hint Answer

Nexttt

	Column I (Population interaction)		Column II (Examples)
A.	Mutualism	(i)	Tick on dogs
B.	Commensalism	(ii)	Balanus and Chathamalus
C.	Parasitism	(iii)	Sparrow and any seed
D.	Competition	(iv)	Epiphyte on a mango branch
E.	Predation	(v)	Mycorrhiza

Guest You need to login to ask any Questions from chapter organisms-and-populations of Biology-MCQS

Chapter:

Log phase

Immigration

Lag, log, decline and stationary

Proto cooperation

Carnivorous

Steady population

A?(v),B?(iv),C?(i),D?(ii),E?(iii)

Mutualism

GR = \(\frac{Natality – Mortality}{Unit time}\)

All Chapters

The Living World

Biological Classification

Plant Kingdom

Animal Kingdom

Morphology of Flowering Plants

Anatomy of Flowering Plants

Structural Organisations in Animals

Cell : The Unit of Life

Biomolecules

Cell Cycle and Cell Division

Transport in Plants

Mineral Nutrition

Photosynthesis in Higher Plants

Respiration in Plants

Plant Growth and Development

Digestion and Absorption

Breathing and Exchange of Gases

Body Fluids and Circulation

Excretory Products and Elimination

Locomotion and Movement

Neural Control and Coordination

Chemical Control and Coordination

Reproduction in Organisms

Sexual Reproduction in Flowering Plants

Human Reproduction

Reproductive Health

Principles of Inheritance and Variation

Molecular Basis of Inheritance

Evolution

Human Health and Disease

Strategies for Enhancement in Food Production

Microbes in Human Welfare

Biotechnology Principles and Processes

Biotechnology and its Applications

Organisms and Populations

Ecosystem

Biodiversity and Conservation

Environmental Issues

Topics

Biology mcqs

In which of following phase do organisms in a population multiply at a faster rate?

Which of following is not a factor that would limit growth of a population?

The correct sequence of growth, curve for bacteria is

In which of following interaction, an association between species is not obligatory but both species are benefited?

Pitcher plant is

What is population having same number of individuals in pre-reproductive post-reproductive age called?

Define life span of an organism. Mention life span of (i) crocodile (ii) crow (iii) parrot & (iv) butterfly.

Which kind of interaction, species A is showing with species B, C and D:-

Which of following formula correctly defines growth rate (GR)?

Guest
You need to login to ask any Questions from chapter organisms-and-populations of Biology-MCQS

$A ? (v), B ? (i v), C ? (i), D ? (i i), E ? (i i i)$