An isotope is an atom of an element that varies in mass number due to variation in the number of:

A. atoms.

B. protons.

C. neutrons.

D. electrons.

What are the functions of a contour feather?

Match the following plant types with their descriptions. 1. hydrophytes aquatic plants 2. mesophytes plants with very dry habitats 3. xerophytes plants with habitats that are neither too wet nor too dry

How substances tend to move across the cell membrane?

Darwin focused on studying specific species on the Galapagos Islands and other places and observed the genetic makeup of the individual species that fossils tell us about the past similar species in different areas with unique traits how individuals

Which of the following is an organic activity? a. root-pry b. abrasion c. carbonation d. exfoliation

What did Virchow observe that led him to determine one of the main components of cell theory?

Discuss the social and biological construction of race in the United states.

From what material is the block made

When water freezes, how does the ice compare to the liquid water? The ice has a greater mass and a greater volume than the water. The ice has the same mass but greater volume than the water. The ice has less mass and less volume than the water.

Angus is accused of having a restriction of range problem in his evaluations of coworkers. what is most likely to be true about angus?