What is the effect of ionizing radiation on DNA?
a. faster replication
b. the formation of nucleotide dimers
c. kinks in the DNA molecule
d. breaks in the DNA molecule
e. base pair mismatching
ANSWER: d
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While standing at the top of the stairs, you have a potential energy of 40 Joules. If you walk all the way down the stairs, what would your potential energy be at the bottom of the stairs?
A. 0 Joules B. 20 Joules C. 40 Joules D. 80 Joules 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 potential and kinetic energy? What other information is related to the question? Choose Answer Do you have all the information needed to answer the question? 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?
Which of the following statements describes how root meristems differ from apical meristems in plants?
A. Cells in root meristems have determinate growth. B. Root meristems are shielded by a root cap that protects cells from abrasion by the soil. C. Cells in root meristems are adjacent to the zone of maturation. D. Cells in root meristems are stimulated by hormones other than auxin.
True or False: Like Drosophila larva, the feeding behavior of honey bees also depends on the expression of the for gene. This suggests that this gene has been evolutionarily
A. true B. false
An estuary is observed as having dense seawater at the surface and freshwater at the bottom after strong winds. What is being exhibited?
a. Tidal overmixing b. Brackish water c. Well-mixed estuary d. Partially mixed estuary