In the phylogenetic tree shown here, which of the following loci represents an ancestor shared by species 1 and 2 but not by species 3? A. C
B. A
C. B
D. D

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.

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?