What does biodiversity mean?

A. is the variety of species in an ecosystem

B. is the variety of food in an ecosystem

C. is the variety of water in an ecosystem

D. is the variety of shelter in an ecosystem

Which statement about how geologists study the ages of rock layers is true? The law of superposition means that older rocks are on top. Geologists can find the exact age of a rock by looking at its relative position.

1. Which of the following is NOT part of the body's first line of defense against disease? A. T Cells B. the skin C. mucous membrane D. tears

What is earth's motion around the sun in a path called?

Which of these scientists is best known for his idea that characteristics an individual gains in its lifetime could be passed on to future generations, eventually leading to the creation of new species? A) Darwin B) Lamarck C) Linnaeus D) Mendel

True or False Theories can be proven true.

What is Thomas Edisons feild of specialty

Giraffes have long necks that allow them to reach more food sources in their habitat. The long neck trait is an example of selection. adaptation. radiation. homology.

Watson, Detra, Fox, Ewing, Gearhart, and DeMotts (1996) administered two self-report alcoholism measures to 118 volunteers recruited from a Veterans Administration Medical Center.

How do scientists determine how to classify organisms?

The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate calcium + zinc carbonate - - calcium carbonate + zinc According to the law of conservation of matter, how much zinc is