Structural adaptations include the following:

Behavioural adaptations include the following:

All of the following are abiotic factors except

The most important limiting factor for algal growth is

The least important limiting factor for small shrubs in a dense forest is

A plant adaptation commonly found in dry climates is

The elephant and hippopotamus could be regards as members of the same species if they

Which is the best feature used to separate prokaryotes and eukaryotes?

The horse and donkey can mate successfully and produce offspring. The result is called a mule and has characteristics of both parents. The mule, however, is infertile. From this information it can be concluded that the horse and donkey:

The scientific name for the eastern grey kangaroo is Marcopus giganteus

In food chains and food webs, the arrows are best described as representing

Light energy is the energy source for most ecosystems. Light energy is used by autotrophs to produce organic material. The energy has been converted to chemical energy that can be stored. When compounds are broken down some energy is unavoidably lost as

Parasite/host relationships are often very complex. Parasites have special adaptations to allow them to obtain nourishment from the host. With regard to these relationships the most accurate statement below is

Relationships between organisms in a community can be classified on the benefit or harm to those involved. Organisms where neither side is harmed include

With respect to competition between organisms, the following statement is true,

Regular changes in ecosystems that influence populations can be described as density-independent or density-dependent. Which one of the following is density-dependent?

Exponential growth in populations does not normall occur in natural populations becuase

Population size is affected by four things; the interplay of birth rate (B), death rate (D), immigration rate (I) and emigration rate (E) will determine whether a population grows or shrinks. Which one of the following is correct?