1. In any food chain or web, the original

source of energy is -

A. the sun.

B. Earth.

C. the producers.

How would a rapid increase in emigration affect a country's population growth rate? keep it relatively stable cause an increase in growth rate cause a decrease in growth rate cause a sharp increase and then a decrease in the growth rate

Does sand have cells?

Natural selection and its evolutionary consequences provide a scientific explanation for each of the following except.

A poor, older Native Alaskan woman lives in a small, remote village near the Canadian border. She has been diagnosed with hypertension and diabetes but rarely makes it to the regional clinic in a distant town for checkups.

These are chemical substances with a measurable pH above that of 7.0 on a 0-14 scale.

The major weakness of the job descriptive index (jdi) is that

What word refers to traces of an organism that existed in the past?

Which of the following would likely extend the Earth's supply of a nonrenewable resource?

How many growing seasons do plants with herbaceous stems usually survive?

What is one advantage of having many small cells instead of one large cell? A. small cells do not have cell membranes B. with many small, cells you have more surface area C. small cells do not require a stable internal environment D.