Organisms and Populations · Biology · NEET
MCQ (Single Correct Answer)
When will the population density increase, under special conditions? When the number of :
Match List-I with List-II.
| List - I | List - II | ||
|---|---|---|---|
| (A) | Migratory flamingoes and resident fish in South American lakes | (I) | Interference competition |
| (B) | Abingdon tortoise became extinct after introduction of goats in their habitat | (II) | Competitive release |
| (C) | Chathamalus expands its distributional range in the absence of Balanus | (III) | Resource Partitioning |
| (D) | Five closely related species of Warblers feeding in different locations on same tree | (IV) | Interspecific competition |
Choose the correct answer from the options given below:
What do 'a' and 'b' represent in the following population growth curve?
The equation of Verhulst-Pearl logistic growth is $$\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left[\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right]$$. From this equation, $$\mathrm{K}$$ indicates:
Which one of the following factors will not affect the Hardy-Weinberg equilibrium?
Given below are two statements:
Statement I: Gause's competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II: According to Gause's principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below :
Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of :
If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per snail per year ?
Given below are two statements:
Statement I : Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.
Statement II : In general, carnivores are more adversely affected by competition than herbivores.
In the light of the above statements, choose the correct answer from the options given below:
Match List I with List II.
| List I (Interacting species) |
List II (Name of interaction) |
||
|---|---|---|---|
| (A) | A Leopard and a Lion in a forest/grassland | (I) | Competition |
| (B) | A Cuckoo laying egg in a Crow's nest | (II) | Brood parasitism |
| (C) | Fungi and root of a higher plant in Mycorrhizae | (III) | Mutualism |
| (D) | A cattle egret and a Cattle in a field | (IV) | Commensalism |
Choose the correct answer from the options given below.
Match List I with List II.
| List I | List II | ||
|---|---|---|---|
| (A) | Logistic growth | (I) | Unlimited resource availability condition |
| (B) | Exponential growth | (II) | Limited resource availability condition |
| (C) | Expanding age pyramid | (III) | The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups |
| (D) | Stable age pyramid | (IV) | The percent individuals of pre-reproductive and reproductive age group are same |
Choose the correct answer from the options given below:
Which one of the following statements cannot be connected to Predation?
While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, ($$-$$) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and ($$-$$) for another specifies involved in the interaction?
If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is ___________ individuals per Drosophila per week.
Nt = N0ert, e represents
| Column - I | Column - II |
|---|---|
| (a) Saprophyte | (i) Symbiotic association or fungi with plant roots |
| (b) Parasite | (ii) Decomposition of dead organic materials |
| (c) Lichens | (iii)Living on living plants of animals |
| (d) Mycorrhiza | (iv) Symbiotic association of algae and fungi |
Choose the correct answer from the options given below :
The logistic model is given as dN/dt = rN(1-N/K)
The conditions :
(a) burrowing in soil to escape high temperature
(b) losing heat rapidly from the body during high temperature
(c) bask in sun when temperature is low
(d) insulating body due to thick fatty dermis
(i) They have dark colour and high rate of reproduction and excrete solid urine
(ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(iii) They feed on dry seeds and do not required drinking water
(iv) They excrete very concentrated urine and do not use water to regulate body temperature
Out of these four, which two are correct-