What part of a tree trunk makes new cells during the growing season?

Free brainliest! what is a characteistic of the american stradfordshire?

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.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?