3 questions. Try each one, then open the answer to check yourself and read the explanation.
What is the part marked X called?
Answer: A (Pulmonary artery)
The pulmonary artery leaves the right ventricle at the top of the heart and carries deoxygenated blood to the lungs.
The main waste products formed in plants are
Answer: A (alkaloids tannins and resins)
Alkaloids, tannins and resins are waste substances that plants store in their tissues or shed with leaves and bark.
The type of placentation shown in the figure above is
Answer: A (parietal)
The ovules are attached to the inner wall of the ovary at several points around one chamber, which is parietal placentation.