Parasitoid wasps are sometimes imvolved in a plant's defensive response. In what way are the wasps helpful to the plant?
The wasps respond to a chemical the plant gives off when wounded, and the wasps lay their eggs on the caterpillar that wounded the plant.
The wasps trigger leaf abscission so that herbivores do not have anything to eat.
The wasps enhance the plants' hypersensitive response.
The wasps stimulate the production of alkaloids the plants use for defense.
The wasps live in hollow thorns of the plants, and attack the plants' predators.
5
Multiple Choice 2 points
Each HIV particle possesses a
q,
on its surface, called gp 120, that precisely binds to a protein, called CD4, that is found on the surfaces of the immune system cells called macrophages and T cells.
glycoprotein
nucleic acid
polysaccharide
glycolipid
phospholipid
26
Multiple Choice 2 points
A researcher is investigating the morphology of complete flowers. Which of the following organs must his flowers contain?
calyx, corolla, receptacle, and carpels
calyx, corolla, carpels, and ovules
calyx, corolla, androecium, and gynoecium
calyx, corolla, stamens, and anthers
calyx, corolla, carpels, and pistils