A planee is flying at a speed of 250 miles per hour. How long does it take to fly 250 (show steps)

As a small change in a person's dna can cause a genetic disorder

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only