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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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12th Standard Zoology - Organisms and Population English Medium Free Online Test One Mark Questions 2020 - 2021

Published on: 05/11/2020

Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 12th Standard - Biology

chapter: - Model Question paper

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Questions:

Multiple Choice Question

10 x 1 = 10

Maximum reproductive capacity of an organism under favorable condition is referred to as_______________

(a)

Carrying capacity

(b)

Biotic potential

(c)

Natality

(d)

Fecundity

Gause's principle of competitive exclusion states that:

(a)

More abundant species will exclude the less abundant species through competition

(b)

Competition for the same resources excludes species having different food preferences

(c)

No two species can occupy the same niche indefinitely for the same limiting resources

(d)

Larger organisms exclude smaller ones through competition

Which two of the following changes (A to D) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more)?
A) Increase in red blood cell size
B) Increase in red blood cell production
C) Increased breathing rate
D) Increase in thrombocyte count

(a)

(B) and (C)

(b)

(c)

(A) and (D)

(d)

(A) and (B)

Diapause is a type of response classified under_______.

(a)

Suspend

(b)

Migrate

(c)

Conform

(d)

Regulate

"Birds and mammals attain greater body size in colder regions than warmer regions." - Choose the correct option.

(a)

Bergmann's rule

(b)

Jordon's rule

(c)

Sewall wright effect

(d)

Allen's rule

The word 'niche' was first used by __________

(a)

Charles Elton

(b)

Van't Hoff

(c)

Bergmann

(d)

Jordon

Some organisms are able to maintain homeostasis by physical means _______

(a)

Conform

(b)

Regulate

(c)

Migrate

(d)

Suspend.

The relationship between sucker fish and shark is__________

(a)

Competition

(b)

Commensalism

(c)

Predation

(d)

Parasitism.

Match the following and choose the correct combination from the options given below.

Column I	Column II
A. Mutalism	1. Lion and deer
B. Commensalism	2. Round worm and man
C. Parasitism	3. Birds compete with squirrels for nuts
D. Competition	4. Sea anemone on hermit crab
E. Predation	5. Barnacles attached to Whales.