How are genetically modified crops made resistant to harmful insects? Explain in 2 sentences or more Pls help

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

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.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a