In humans, body temperature is kept fairly constant by automatic responses controlled by which of the following?
a. heart rate
b. the skin
c. the hypothalamus
d. the amount of muscle

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Male-patterned baldness is more common in males as the name suggest.why is this? a.the gene for baldness is on chromosome 5 b.the gene for baldness is on chromosome 1 c.the gene for baldness is on he x chromosome d.the gene for baldness is on the y chromosome

What organic substance cuts dna into different sized fragments?