Human pupil size can change in response to light availability. This happens in each eye as the iris, which is the colored part of the eye, expands and contracts to regulate the amount of light entering each pupil.

The ruiz family is exchanging euros for us dollars. the exchange rate is 1 euro equals 1.35261 usd. since the ruiz family knows that usd are stated to the nearest hundredth of a dollar, they used the conversion ratio

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?

What is the starting point in replication called