The stalk that supports the individual eudicot leaf is the ____
a. collenchyma
b. petiole
c. node
d. sclereid
e. peduncle
ANSWER: b
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How many subunits make up a G protein?
A. two B. three C. four D. The number is variable.
Alexander Fleming kept finding mold contamination that was killing his bacterial cultures. This observation eventually lead to the development of the antibiotic penicillin. Why would a fungus produce a compound that is selectively toxic to bacteria?
A. Fungi eat bacteria. B. Fungi are killed by bacterial toxins. C. Fungi compete with bacteria for resources. D. Killing bacteria is an accident. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about fungi and bacteria? What other information is related to the question? Choose Answer Given what you now know, what information 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?
Lysosomes maintain an acidic environment by actively pumping protons into their interior.
Answer the following statement true (T) or false (F)
Which of the following is characteristic of prokaryotic genomes but NOT eukaryotic genomes?
A) histones B) circular chromosomes C) linear chromosomes D) enclosed in a nuclear membrane E) typically consist of a few to several chromosomes