21, The most valid and reliable test of the hypothesis, more pine seeds germinate after a forest fire, would include an experimental group of pine seeds that was recovered from a fire area and pine seeds that were—
22. Which of the following might be referred to as " working macromolecules "?
23. Lipids are used for
24. The first step of the scientific method involves:
25. Identify two specific polysaccharides and describe where they are found and what their biological role is.
26.
Enzymes will usually react with only one substance. This can be explained by the ' lock and key ' theory. If this theory is correct, which of the following substances, represented by P, Q, R and S would be acted on by enzyme A?
Which particles have approximately the same size and mass as each other?
A solution with a pH below 7 is
What is a solution that has an excess of H +( hydrogen) ions?
The group of biologically important organic compounds responsible for storage and transfer of information is
feedback acts to maintain a homeostasis feedback loop and reverses the direction of change.