3. An 8 kg cat is sitting in a tree on a tree branch. At the same height, a 2 kg bird is perched. Which statement is true?*
The cat has more potential energy than the bird
The bird has more potential energy than the cat
The cat and the bird have qual (nonzero) values of potential energy

the answer is d.) homologous; have mammary glands

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.