Substances like oxygen pass through the cell without the use of energy and move from an area of high concentration to an area of low concentration. This process is called

Would you expect something with a pH of 4 to be more or less acidic than human blood?

What is the best wavelength to use if an astronomer wants to study the composition of planets and stars? Select one: a. gamma rays b. microwaves c. visible light d. radio waves

Fungi can be beneficial or destructive. One type of fungi, the smuts, attack grain plants like corn and wheat. What would likely happen to grain crops when they are attacked by smut?

Succinylcholine is structurally almost identical to acetyicholine but if combined with the enzyme that normally hydrolyzes acetylcholine, the enzyme is no longer able to hydrolyze actylcholine. Explain

Which one of the following is NOT a characteristic of eukaryotic cells? Have membrane-band organelles. Make up plants and animals. O Make up bacteria cells. Have a nucleus.

Which of the following is not a macronutrient? A) Carbohydrates B) Protein C) Vitamin C D) Fat

Agglutinins are surface antigens on RBCs. contain abundant stained "granules." prevent blood clotting. are antibodies that will attack surface antigens on RBCs of a different blood type.

Which of the following best explains why humans need constant supplies of fresh water? a. Humans need a constant supply of water to provide them with essential vitamins. b. Humans need a constant supply of water to maintain proper hygiene. c.

Which one of the following would be a good tool to represent data in terms of percentage of a whole?

A. E. coli is able to use foods other than glucose in the absence of available glucose, because falling levels of glucose cause an increase of B) activator protein A) operator B) promotor C) structural gene D) CAMP