1. Which term describes the role and position of an organism in its ecosystem?
Answer:
Explanation:
A niche refers to the role and position an organism has in its environment.
2. Which of the following best defines “population density”?
Answer:
Explanation:
Population density gives a measure of the number of organisms in a specified space.
3. In which type of population dispersion do individuals maintain a certain distance from each other?
Answer:
Explanation:
In uniform dispersion, individuals are evenly distributed and maintain a certain distance from each other.
4. Which type of interaction is beneficial for both species involved?
Answer:
Explanation:
In mutualism, both species involved derive benefits from the interaction.
5. Which of the following factors affects the life history variation in organisms?
Answer:
Explanation:
Life history traits of an organism can be influenced by various ecological factors, including predation, competition, and disturbance.
6. What is the primary factor for an organism’s ecological success in an aquatic environment?
Answer:
Explanation:
In aquatic environments, buoyancy determines the ability of an organism to remain suspended in water.
7. What term describes a group of individuals of the same species living in a particular geographic area?
Answer:
Explanation:
A population comprises individuals of the same species living in a specific area.
8. Which pattern of population growth is represented by the equation
Answer:
Explanation:
The equation represents a population’s exponential growth, where N is population size, r is intrinsic growth rate, and
9. Which factor is NOT density-dependent in population regulation?
Answer:
Explanation:
Weather conditions are density-independent factors, meaning they affect population size regardless of the population’s density.
10. Which organism shows a K-strategy of reproduction?
Answer:
Explanation:
K-strategists like humans have fewer offspring, provide parental care, and have longer life spans.
11. Which of the following is NOT an abiotic component of the habitat?
Answer:
Explanation:
Bacteria are biotic components as they are living organisms.
12. Which curve represents the growth of a population when resources are unlimited?
Answer:
Explanation:
A J-shaped curve represents exponential growth, which occurs when resources are unlimited.
13. Which term describes the maximum number of individuals that an environment can support indefinitely?
Answer:
Explanation:
Carrying capacity refers to the maximum population size that an environment can support over time without degradation.
14. Which of the following is a density-independent factor affecting population size?
Answer:
Explanation:
Natural disasters affect populations regardless of their density and are thus density-independent.
15. Which animal is capable of obtaining water by oxidation of lipid?
Answer:
Explanation:
The Kangaroo rat is adapted to desert life and can obtain water through the oxidation of fats present in the seeds it consumes.
16. Which is the example of intraspecific competition for food?
Answer:
Explanation:
Intraspecific competition refers to competition among members of the same species. Here, two female dogs and two male dogs represent individuals of the same species competing for the same resource.
17. Name the animals with freshwater habit in which:
Answer:
Explanation:
Crustaceans like Astacus (crayfish) have green glands that function in excretion and osmoregulation, removing excess water in the form of dilute urine.
18. In snakes, realized (actual) natality is less than potential natality because…
Answer:
Explanation:
Realized natality refers to the number of offspring that actually survive and reach reproductive age. For snakes, various factors like non-incubation of eggs, environmental resistances, and high mortality rates among juveniles contribute to the difference between potential and realized natality.
19. From the given option which is the appropriate for ecto parasite animal Ascaris, Tapeworm, Plasmodium, mites?
Answer:
Explanation:
Mesofauna refers to small animals, including arthropods and nematodes, which live in the soil. Among the given options, mites would fit the category of mesofauna and are ectoparasites.
20. Which living organism is seen in the hot water spring having temperature more than 100°C?
Answer:
Explanation:
Thermoacidophils are extremophiles that thrive in extremely hot, acidic environments such as hot springs with temperatures exceeding 100°C.
21. What is the vital index, if Birth rate is 0 and Death rate = 5?
Answer:
Explanation:
The Vital Index is calculated as (Birth rate/Death rate) x 100. If the birth rate is 0, the Vital Index will be 0, regardless of the death rate.
22. If the Birth rate is 10 and death rate is 0 then what is VITAL INDEX?
Answer:
Explanation:
The Vital Index is calculated as (Birth rate/Death rate) x 100. If the death rate is 0, the Vital Index becomes infinite because division by zero is undefined in mathematics.