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In a group of male Agama lizards, the one with the brightest head colour is the
The older fossil-bearing rocks, in contrast to the more recent ones, are more likely to contain?
Blood grouping in human beings is derived from combinations of
The surest way to combine the best qualities of both parents in the offspring is by
The pollutants that contribute to the depletion of the ozone layer in the atmosphere are
A cross between an albino female and a genetically normal male will result in offspring that are
The factors that determine the distribution of vegetation zones are
The legs and beak of an egret resemble those of the heron because they
The disaster that would have the least destructive impact on animal life and balance in nature is
In a food chain, each succeeding level in a forward direction represents
Which of the following is an adaptation of tropical rainforest species?
Which of the following are adaptations of animals to aquatic habitats?
Which of the following growth activities in plants is brought about by gibberellins?
The range at which soil essential elements concentration is recorded for optimal plant growth is marked
The soil becomes toxic to plants when the concentration of its essential elements is in the range labelled
I. High birth rate and high immigration rate II. Low birth rate and high immigration rate III. Low mortality rate and low emigration IV. High mortality rate and high emigration rate. Which combination of the above can cause rapid over-crowding in climax biotic communities and human settlements?
Atmospheric nitrogen is converted to soil nitrogen for plant use by
An ecological succcession often leads to
In an experiment to estimate the volume of air in a soil sample using a measuring cylinder, it was found that:
initial volume of water .... = p cm3
volume of soil before mixing with water = q cm3
Final volume of water after adding soil = r cm3
From the data above, which of the following deductions is correct?
The fruit represented is mainly dispersed by?