MEDIUM
12th CBSE
IMPORTANT
Earn 100

Differentiate between parasitism and competitions, giving one example of each. State the common characteristics they share.

Important Questions on Organisms and Populations

MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 15

During a school trip to "Rohtang pass", one of your classmates suddenly developed altitude sickness. But she recovered after some time.

(a) Mention one symptom to diagnose the sickness. 

(b) What caused the sickness?  

(c) How could she recover by herself after some time.

MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 16
In certain seasons we sweat profusely while in some other we shiver. Explain.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 17
Explain with the help of suitable examples, the three different ways by which organisms overcome their stressful condition lasting for a short duration.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 18
Name and explain the type of interaction that exists in mycorrhizae and between cattle egret and cattle.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 19
Predation is usually referred to as a detrimental association. State any three positive roles that a predator plays in an ecosystem.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 20
Explain parasitism and co-evolution with the help of one example of each.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 21
"Organisms may be conformers or regulators". Explain this statement and give one example of each. 
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 13 - Organisms and Populations>TEST QUESTIONS>Q 21
Why are there more conformers than regulators in the animal world?