When does a cell need to use active transport?

How does the pulmonary vein differ from the other veins in the body?

Is natural selection considered a biotechnology? Why or why not?

Why are chromosomes not always visible? a. They are often very loosely coiled in strands of chromatin b. They are wound very tightly c. They lose pigment in sunlight d. They are often behind the nuclear envelope

What is activation energy? the energy needed to get a reaction started the energy stored in the bonds of a reaction's enzyme the energy absorbed by the bonds that form in a reaction the heat energy given off by a reaction

11.) Which of the following is NOT an example of translational control of gene expression in prokaryotes? a) The end product of a biosynthetic pathway binding and arresting the activity of the first member of the pathway.

Any disorder associated with the Y chromosome

What type of organic molecule is a starch

You will try to view as many cell organelles as you can at different magnification levels. Write an investigative question that you can answer in doing so

Geography, among other things, is responsible for the rise and fall of great civilizations. What three things were responsible for the rise and fall of some of the great Mesoamerican civilizations in the Americas?

The drought alone did not cause the dust bowl. It was combination of several things, the drought and