Which alternative in the table best describes the organ or process at X, Y and Z?
What is the name used to describe this particular type of control system?
Like animals, plants use a number of processes for the movement of substances. Which of the following requires a plant to use cellular energy?
In Labrador dogs, black fur “B” is dominant to white fur “b”. What would be the phenotypic ratio of the offspring from a cross between a heterozygous black dog and a white dog?
Palaeontology contributes to our understanding of evolution by
In the normal kidney of a human, which of the following substances would not be found in the Bowman's capsule?
What is the purpose of the mechanisms of homeostasis?
Which water treatment best reduces the risk of infection by killing pathogens in drinking water?
The action of co-enzymes can affect the activity of an enzyme by:
Which of the following statements is true?
The production of a transgenic organism does not involve
Plants cannot move away from extremes of temperature. Which of the following mechanisms may be employed by plants in response to a large increase in temperature?
Which of the following adaptations would decrease the chance of survival for a mammal living in an extremely cold habitat?
In fruit flies that are homozygous for the gene for vestigial wings have wings that are only tiny stumps if they are reared at room temperature (about 22oC). But if they are reared at temperatures as high as 32oC their wings will grow almost as long as normal wings. This is an example of:
The two diagrams each represent a type of evolution -