1. | All the biological factors in the organism environment |
2. | The physical space where an organism lives |
3. | The range of temperature that the organism needs to live |
4. | The functional role played by the organism where it lives |
Natality refers to:
1. Death rate
2. Birth rate
3. Number of individuals leaving the habitat
4. Number of individuals entering the habitat
1. | pre-reproductive individuals are more than reproductive individuals. |
2. | reproductive individuals are less than post-reproductive individuals. |
3. | reproductive and pre-reproductive individuals are equal in number. |
4. | pre-reproductive individuals are less than reproductive individuals. |
1. Commensalism
2. Mutualism
3. Parasitism
4. Amensalism
1. | Smaller animals have a higher metabolic rate |
2. | Small animals have a lower O2 requirement |
3. | The efficiency of muscles in large animals is less than, in the small animals |
4. | It is easier to carry a small body weight |
According to Darwin, organic evolution is due to:
1. | Interspecific competition. |
2. | Competition within closely related species. |
3. | Reduced feeding efficiency in one species due to the presence of interfering species. |
4. | Intraspecific competition. |
What type of human population is represented by the following age pyramid?
1. | 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 |
Formation of tropical forests needs mean annual temperature and mean annual precipitation as:
1. 18 – 25oC and 150 - 400cm
2. 5 – 15oC and 50 – 100 cm
3. 30 – 50oC and 100 – 150cm
4. 5 – 15oC and 100 – 200 cm
The table below gives the populations(in thousands) of ten species(A--J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question as follows:
which area out of a to d shows maximum species diversity?
1. b
2. c
3. a
4. d