Answer:
Ice Age mammals first appeared 18,000 years ago... during the Ice Age lol
Hope this helps
Explanation:
I think it would be coal and oil.they are energy sources.
there could be harmful chemicals
When it is said that mutation is the ultimate source of genetic variation it means that it creates several new combinations which is similar to meiosis and fertilization because <span> new alleles and genes appear. It is just about some common points.</span>
False because the third line of defense is specific by identifying the foreign antigen and activating the antibodies that can bind to the invaders and eliminating the spread