Which three things do all living cells have in common?
a. a nucleus, cytoplasm, and a cell wall
b. cytoplasm, a cell wall, and lysosomes
c. a nucleus, ribosomes, and a cell membrane
d. DNA, a cell membrane, and a nucleus
e. a plasma membrane, DNA, and cytoplasm
E
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A scientist has an uncharacterized pea plant. She wants to determine the plant’s genotype for seed color. In order to be certain that she will get conclusive results from a single cross, with what plant could she cross it? Check all that apply.
_____ a green-seeded pea plant (yy) _____ a yellow-seeded pea plant (YY) _____ itself Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about testcrosses? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
X-ray data showed that the DNA helix undergoes one complete turn every
A) 2.0 angstroms. B) 3.4 angstroms. C) 20 angstroms. D) 34 angstroms.
In humans, goosebumps are a vestige of a mammalian adaptation related to ________
A) thermoregulation B) water conservation C) osmoregulation D) positive feedback
Which sequence presents the digestive structures of an annelid in the proper order?
a. mouth, esophagus, crop, gizzard, intestine, anus b. mouth, esophagus, gizzard, crop, intestine, anus c. mouth, esophagus, intestine, gizzard, crop, anus d. mouth, esophagus, crop, intestine, gizzard, anus