To get pollinated by a bee, the Mediterranean Orchid, Ophrys, employs:
1. Sexual deceit
2. Pseudo-copulation
3. Reward in the form of Nectar
4. Place for laying eggs
The country with the given population pyramid is likely to have:
1. Low birth rate
2. High death rate
3. Declining population in future
4. More females than males
In a tide pool, 15 species of invertebrates were reduced to 8 after one species was removed. The removed species may be a:
1. Parasite
2. Mutualist
3. Top predator
4. Herbivore
The logistic growth curve of animal population growth is more realistic than J shaped curve because:
1. Asexual mode of reproduction is rare in higher animals
2. Resources are finite and become limiting sooner or later.
3. Most animals are conformers rather than regulators
4. Abiotic factors affect animals more than plants
Which of the following is not a function of predators?
1. | They act as conduits for energy transfer across trophic levels |
2. | They keep prey populations under control |
3. | They help in the stabilization of the ecosystems |
4. | They decrease the species diversity in a community |
When the population density reaches the carrying capacity, the logistic growth curve is said to be in:
1. Lag phase
2. A phase of acceleration
3. A phase of deceleration
4. Asymptote
In general, which of the following is not an adaptation seen in parasites in accordance with their life style?
1. Loss of unnecessary sense organs
2. Presence of adhesive organs
3. Low reproductive capacity
4. Loss of digestive system
No predator can become proficient at acquiring prey because:
1. | Predators are not as intelligent as prey. |
2. | Predators are too large to be fast enough. |
3. | Prey populations evolve more rapidly than predator populations. |
4. | Prey populations evolve anti-predatory traits. |
Mycorrhizae are the example of
(1) fungistasis
(2) amensalism
(3) antibiosis
(4) mutualism
If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to
(1) Mutualism
(2) Amensalism
(3) Commensalism
(4) Parasitism