How is it possible that species continued to go extinct in the months that followed the asteroid impact?

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not