. What is a blastula?

a hollow ball of cells
a hollow tube of cells
a solid ball of cells
a long sheet of cell

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.