True or False? and why?

Because the DNA double helix is only 2 nm wide - well below the limit of resolution of the light microscope - it is impossible to see chromosomes in living cells without special stains.

Why is an engineer an applied scientist?

Which rock had particles that traveled further ... conglomerate or breccia?

Which is not a guideline for avoiding hip dislocation after replacement surgery. A. The hip may be flexed to put on clothing such as pants, stockings, socks, or shoes. B. Never cross the legs when seated. C. Keep the knees apart at all times. D.

What is a type of cell that relies on coupled transport to perform its function?

Which statement describes a common measurement error? a) a flaw in the design of an experiment b) using inconsistent methods for collecting data c) using instruments that have not been calibrated d) selecting experimental subjects in a way that is

What is the complementary base of adenine in DNA? guanine cytosine thymine uracil

Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride cells in the gills aid fish in the removal of excess ions? A.

Name three groups of plastic sedimentary rocks

A section of DNA that carries enough information to make a single protein is called a (an) A. codon. B. enzyme. C. gene. D. intron.

During the winter months, water on the surface of a pond will typically freeze and this ice acts as an insulator for the water beneath it. As a result, aquatic life is able to survive during the cold winter.