The periodic shedding of the uterine lining usually takes place -- O after menopause
O during pregnancy
O if fertilization does not occur
O before puberty begins​

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

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.

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?