The left ventricle has the thickest walls because it: a. pumps blood into the aorta and systemic circulation. b. uses less oxygen than other chambers of the heart. c. pumps blood to the lungs to be reoxygenated. d. receives blood directly from the systemic circulation.

your the dumbest b**tch ive ever seen

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.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

a covalent bond, specfically triple bond