Between which of the following, the relationship is not an example of commensalism?
1. Orchid and the tree on which it grows
2. Cattle Egret and grazing cattle
3. Sea Anemone and Clownfish
4. Female wasp and fig species
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCarnivorous 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-
1. Character displacement
2. Altruism
3. Resource partitioning
4. Competitive exclusion
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe formula for exponential population growth is :
1. dt/dN= rN
2. dN/rN= dt
3. rN/dN= dt
4. dN/dt= rN
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGeometric representation of age structure is a characteristic of:
1. Biotic community
2. Population
3. Lanscape
4. Ecosystem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations. A and B are twenty years apart. Select the correct interpretation about them:
Interpretations
1. | 'A' is more recent and shows a slight reduction in the growth rate |
2. | 'B' is an earlier pyramid and shows stabilised growth rate |
3. | 'B' is more recent showing that the population is very young |
4. | 'A' is the earlier pyramid and no change has occurred in the growth rate |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do (a), (b) and (c) represent, respectively?
(a) |
(b) |
(c) |
|
1. |
Regulator |
Conformer |
Partial regulator |
2. |
Conformer |
Regulator |
Partial regulator |
3. |
Regulator |
Partial regulator |
Conformer |
4. |
Partial regulator |
Regulator |
Conformer |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyStudy the four statements (a–d) given below and select the two correct ones out of them –
a. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
b. Predator star fish Pisaster helps in maintaining species diversity of some invertebrates
c. Predators ultimately lead to the extinction of prey species
d. Production of chemicals such as nicotine, strychnine by the plants are metaboilic disorders
The two correct stament are-
1. a and d
2. a and b
3. b and c
4. c and d
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | Human foetus developing inside the uterus draws nourishment from the mother |
2. | Head louse living on the human scalp as well as laying eggs on human hair |
3. | The cuckoo (koel) lays its eggs in a crow's nest |
4. | The female Anopheles bites and sucks blood from humans |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat type of human population is represented by the following age pyramid?
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyI. | Burrowing in soil to escape high temperature |
II. | Losing heat rapidly from the body during high temperature |
III. | Bask in the sun when the temperature is low |
IV. | Insulating body due to the thick fatty dermis |
1. | (I) and (III) | 2. | (II) and (IV) |
3. | (I) and (II) | 4. | (III) and (IV) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology