After the DNA is copied (DNA replication), two sister chromatids are held together by

a

a centromere

b

a chromosome

c

a centrosome

d

a centriole

The appearance of cuticle and stomata correlated with what event in the evolution of green plants?

Which of the following is most likely to encourage a person to make healthful decisions?

What is the main function of xylem tissue in the plant transport system?

How did we learn that eukaryotic chromatin exists in the form of repeating nucleosomes, each consisting of about 200 base pairs and an octamer of histones?

What is an example of a spontaneous exergonic reaction?

When an accurate experiment is repeated by another scientist, the results A) should be similar to those obtained originally. B) will be identical every time the experiment is repeated. C) should be completely different for a different scientist.

1. Which of the following forms all matter?

True or false Sedimentary rock can be formed from changes in igneous rock, but igneous rock cannot be formed from changes in sedimentary rock.

When a protein is denatured, why does it lose its functionality?

This is a rotating machine that converts the kinetic energy of the wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a grinding stone, the machine is usually called a windmill.