The growth rate of a natural population equals zero:

1.	when N/K is exactly one
2.	when N nears the carrying capacity of the habitat
3.	when N/K equals zero
4.	when mortality is greater than natality

The growth of a population is unlikely to be limited by:

Identify the correct statements about symbiotic relationships:

In the formula for exponential growth (dN/dt = rN), what does ‘r’ stand for?

The population distribution pattern that will be seen in territoriality is:
1. random
2. uniform
3. clumped
4. None of the above. Territoriality isn't important in determining distribution patterns.

If an organism has type III survivorship curve, the mortality rate of the population will be:
1. fairly constant throughout life
2. higher in post-reproductive years
3. lower after the organisms become established
4. unrelated to age

Morphological defense is the most common defense in plants against herbivory. An example of such a defense would be:
1. Beltian bodies
2. mustard oils
3. epiphytes
4. silica

The biome characterized by a mean annual temperature between 5$°$C and 22$°$C and mean annual precipitation between 5 cm and 50 cm is:
1. Desert
2. Arctic and alpine tundra
3. Temperate forest
4. Grassland

Temperature is significant for living organisms as it primarily affects:

Many freshwater animals cannot live for long in sea water and vice versa because of:
1. Buoyancy related problems
2. Lack of impermeable skins
3. Thermolabile enzymes
4. Osmotic considerations