What are the two main source of energy on earth that can drive ecosystems?

Match the types of competition to their descriptions

Donde se encuentra el adn nuclear en un organismo eucariota?

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