Some pathogens can remain contagious in dried blood for up to
a. a week
b. three weeks
c. 10 days
d. two weeks

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

In which layer do organisms on earth love?