What is the species introduced into ecosystems, intentionally or unintentionally, and usually by humans? some can take over - perhaps destroying - entire ecosystems. the lionfish is one example?

We refer to the Dna code as being redundant or repetitive. This means that

Why are lichens so important for primary succession?

Anyone know the anwser? What is the cause of lightning? A. Airflow between a cloud and the ground B. Varying air pressure underneath a cloud C. Different charges on the ground and the bottom of a cloud D.

Which type of homogeneous mixture cannot be filtered and does not scatter light?

Seasonal changes occur because of A. Earth's tilt. B. Earth's shape. C. the distance between Earth and the moon. D. the time of year.

Calcium and bromine would join with a __bond and sulfur oxygen would join with a ___bond

What does lipase digest? A. Carbohydrates B. Proteins C. Fats

1. Any molecule that contains carbon to hydrogen bonding is known as a A) water B) inorganic molecule C) organic molecule 2. How many valance electrons are generally needed to fill the outer shell of most atoms? A) 4 B) 6 C) 8 3.

Benefits of using coal oil and natutal gas

An ionic bond is most likely to form between: a) a negatively and a positively charged ion. c) two uncharged atoms. b) two positively charged ions. d) two negatively charged ions.