Which one of the following is true with regard to the numbers of subatomic particles in an atom?
A. The number of neutrons always equals the number of protons.
B. The number of electrons always equals the number of neutrons.
C. The atomic number always equals the number of protons.
D. The atomic number always equals the number of neutrons.
C. The atomic number always equals the number of protons.
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Air rushes into the lungs of humans during inhalation because
A. the volume of the thoracic cavity increases. B. pressure in the alveoli increases. C. the diaphragm contracts and pushes upward on the chest cavity. D. smooth muscle lining the trachea, bronchi and bronchioles contracts and causes their volume to increase. E. pulmonary muscles contract and pull on the outer surface of the lungs.
Generally speaking, nutritionally variant streptococci require what ingredient not found in most conventional media?
a. Vitamin B6 b. Nalidixic acid and its components c. Nicotinamide adenine dinucleotide (NAD) enrichment d. Blood or blood products
The habitat of a species has
a. both abiotic and biotic factors. b. neither biotic or abiotic factors. c. biotic factors. d. abiotic factors.
Which of the following is a producer?
A. pine tree B. cricket C. mushroom D. rabbit E. red-tailed hawk F. earthworm Clarify uestion · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about trophic levels? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?