Multiple Choice QuestionsChoose the wrong pair
Cenchrus-Savanna
Abies – Coniferous forest
Quercus – Broadleaf forest
Tectona – Temperate forest
Match the following Columns
| Column I (Pollination Technique) | Column II (Pollinator) |
| A. Cheiropterophily | 1. Ant |
| B. Anemophily | 2. Bat |
| C. Myrmecophily | 3. Snail |
| D. Malaciphily | 4. Wind |
A – 3; B – 2; C – 1; D – 4
A – 2; B – 4; C – 1; D – 3
A – 4; B – 3; C – 2; D – 1
A – 1; B – 3; C – 2; D – 4
The permanent decrease in population number occurs due to
migration
natality
emigration
mortality
The process where a population inhibits the growth of other population without affecting itself is known as
amensalism
mutualism
parasitism
commensalism
Which of the following is not a factor that would limit the growth of a population
Food shortage
Immigration
Disease
Famine
A small rise in the body temperature of humans is corrected by
(i) sweating
(ii) dilating the skin arteries
(iii) constricting the skin arteries
(iv) increased tension of muscles in the skin
(i) only
(ii) only
(i) and (ii)
(iii) and (iv)
C.
(i) and (ii)
A small rise in body temperature is detected by sensory receptors in the skin and by special neurons, which monitor blood temperature, in the hypothalamus itself. When the neural centre of the hypothalamus involved in lowering body temperature receives information that body temperature is too high, it commands the arteries of the skin to dilate so that more blood, and therefore more heat, reaches the surface where heat can be lost. A large rise in body temperature causes the hypothalamus to command both an extreme dilation in the arteries of the skin and the release of sweat from the body
Which of the following associations shows mutualism
Fig and wasp
Barnacles on whale
Roundworms in human intestine
Orchids on mango tree
Which is correctly labelled with respect to the given diagram
B: Logistic curve
C: Carrying capacity
C: Exponential curve
A: Carrying capacity
Assertion: Some marine animals find it difficult to live in fresh water and vice versa.
Reason: Some animals can tolerate a narrow salinity range, while others can tolerate a wide salinity range.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false
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