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Nucleus is a part of living things which controls activities due to the presence of the DNA in it.

Glomerular filtrate contains H\(_2\)O, glucose, salts and urea and it is identical to blood plasma that lacks most proteins.

Organic evolution is the sum total of adaptive changes from pre-existing or old form that have taken place over a long time resulting in diversity of forms, structures and functions among organisms.

Operculum or gill cover helps the tilapia fish in gaseous exchange.

The tilapia fish can be classified under chordata phylum in the animal kingdom.

One of the important characteristics of green plant is that they can manufacture their food (Autotrophic).

A virus is regarded as animate is because it can reproduce in living cells. It can also be inanimate when it is not in living cells.

A population is described as the total number of organisms of the same species living together in a given area at a particular time.

Ecological niche refers to the specific portion of a habitat which is occupied by a particular species or organism. It is the functional position of an organism within the community.

Respiration can either be aerobic or anaerobic respiration. Hence, in plants, all living cells take part in a form of respiration. Plant respiration is a rather diffuse process. It occurs all over the plant.

Discontinuous variation is the differences of variations in behaviour by which organisms can be grouped into 2 or more classes within a population without any intermediates among them e.g Behaviour, ability to roll tongue.

Clay soil is the soil with highest water retaining capacity.

Rabbits does not have the adaptive features of an aquatic habitat like gills therefore, it cannot survive in an aquatic habitat.

Water passes through the root cell membrane of plant in order for osmosis to take place.

Trees in savanna habitats have developed thick, corky bark primarily as an evolutionary adaptation to survive the frequent bush fires that characterize these ecosystems during the dry season. The bark acts as a natural insulator, protecting the sensitive internal living tissues—specifically the cambium and vascular systems—from the intense heat.