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In evolution, adaptation is a change that makes an organism better suited to living in its environment. 

Part of the immune system that responds to specific antigens.

The second-largest of the world's five oceans.

A cent is a small unit of month worth one-hundredth of some currencies, for example the dollar and the euro.

Country in Central Europe.

Moving in the opposite direction of the hands on a clock.

The protective liquid contained by the amniotic sac.

A long, single nerve fiber that transmits messages, via electrochemical impulses, from the body of the neuron to dendrites of other neurons, or directly to body tissues such as muscles.

Country in Central Europe.

Area (mathematical)