Overall, how has science impacted human health?
a. more types of surgery, so more unsafe procedures.
b. increase in pollution has lead to a decrease in average lifespan.
c. increased average lifespan to 78 in the us.
d. it has had no effect.

What makes a dominant allele different from a recessive allele

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.

Do fish feel pain? and if they do what pain