One of the reasons study of nitrogen use in plants is of special interest is because:
A. Nitrogen is limited in our atmosphere.
B. Nitrogen in its atmospheric form is not useable by plants.
C. Nitrogen is often toxic to plants.
D. None of the forms of nitrogen are easily absorbed by plants.
E. Nitrogen is not an essential element for plant growth.
B. Nitrogen in its atmospheric form is not useable by plants.
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In some ciliate protozoa, the codons UAA and UAG encode glutamate, rather than acting as STOP codons. How does this compare to other species?
A. This is unusual – almost all species share the same “universal” genetic code. B. This is typical – every species has its own unique genetic code. C. This is not unusual – while most species have a similar genetic code, there are often variations for some of the amino acids. 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 the genetic code? 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?
Jack has type O blood and his mother has type A blood. His father could have any of the
following blood types EXCEPT
a. A. b. B. c. AB. d. O.
Cancer cells
a. maintain telomerase function b. have longer telomeres than normal cells c. eventually die due to shortening chromosomes d. have circular chromosomes e. cannot replicate their DNA
____ are short sections of underground stem
encased by overlapping layers of thickened, modified leaves called scales. a. Stolons b. Rhizomes c. Bulbs d. Corms e. Tubers