You perform a testcross on a tall pea plant. half the offspring are short. what conclusion can you draw from this outcome. a) a change in the gene's dna changed the form of the trait. b) the tall pea plant was crossed with a heterozygous plant c) the genotype of the tall pea plant is homozygous d) the genotype of the tall pea plant is hetetozygous

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.

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast