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Very small animals are rarely found in polar regions. Give two
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Very small animals are rarely found in polar regions. Give two reasons. 

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Updated on: Aug 29, 2023

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Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

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Small animals have larger surface area relative to their volume, loose heat very fast, due to small size, expend much energy to generate body heat through metabolism.
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Practice questions from Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

Question 1
Easy
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Provide an instance where the population size of a species can be estimated indirectly, without actually counting them or seeing them.
Topic

Topic:

Organisms and Populations

Book

Book:

Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

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Question 2
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Between amphibians and birds which are more likely to be able to cope with global warming ? Give reasons.
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Organisms and Populations

Book

Book:

Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

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Question 3
Easy
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Mention how do bears escape from stressful time in winter ?
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Topic:

Organisms and Populations

Book

Book:

Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

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Question 4
Hard
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(a) Following are the responses of different animals to various abiotic factors. Describe each one with the help of an example
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Topic

Topic:

Organisms and Populations

Book

Book:

Oswaal CBSE Question Bank Class 12 Biology Chapterwise and Topicwise (Oswaal)

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Question 2
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Carnivorous animals lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as
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Question 3
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Formation of major biomes such as desert, rainforest takes place by
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Question 4
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A species whose distribution is restricted to a small geographical area due to the presence of a comparatively superior species expands its distribution when the competing species is experimentally removed. This phenomenon is called-
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Question 3
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The phase/stage at the end of meiosis I and before meiosis II is called: Question options: Cytokinesis Cytolysis Cytophases Cytosynthesis Interkinesis In mitosis, the nuclear membrane fragments during: Question options: Interphase Prophase Metaphase Anaphase Telophase The end product(s) of spermatogenesis is(are): Question options: 1 sperm and 3 polar bodies 3 sperms and 1 polar body 2 sperms 4 sperms None of the above Spindle fibers begin to disappear (disintegrate) during: Question options: Prophase Metaphase Anaphase Telophase Interphase If a parent cell has 18 chromosomes, each daughter cell following meiosis II will have ________ chromosomes: Question options: 18 9 18 pairs 9 pairs Any number between 18 and 36
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Question Text
Very small animals are rarely found in polar regions. Give two reasons. 
Updated OnAug 29, 2023
TopicOrganisms and Populations
SubjectBiology
ClassClass 12
Answer TypeText solution:1 Video solution: 5
Upvotes648
Avg. Video Duration10 min