Which of the following large-scale environmental catastrophes has the least effect on aquatic ecosystems?

a.
oil spills
b.
deforestation
c.
global warming
d.
pollution

In order to clone adult animals, scientists typically begin with a(n)

Could someone me with number one you

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation