Biology B (Advancing Biology) H022: Gas exchange in mammals and plants Topical Past Paper Questions

Amino acids have the same general structure with four different chemical groups attached to a central carbon atom. The structure of the amino acid valine is shown in the diagram. (a) One of the chemical groups in valine has been labelled on the diagram Circle and label two other…

Which of the plant structures, A to D, has intercellular spaces to allow for the process of gas exchange? A sieve tubes B lenticels C root hairs D xylem vessels

The rate of transpiration can be affected by changing certain environmental factors. Which of the options, A to D, are changes that would result in an increased rate of transpiration? A lower humidity and greater air movement B lower humidity and less air movement C higher humidi…