Some pituitary hormones cause the ovaries to secrete hormones. these ovarian hormones then influence the production of the pituitary hormones. this type of control mechanism is known as
1) a menstrual cycle
2) ovulation
3) gametogenesis
4) negative feedback

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.