Red blood cells do not contain
a. a cell membrane.
b. cytoplasm.
c. hemoglobin.
d. a nucleus.
e. a nucleus and other organelles.
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?
Literally hundreds of clinically useful EIAs have been developed
Indicate whether the statement is true or false.
Most species of animals are:
a. invertebrates. b. carnivores. c. radially symmetrical. autotrophs. d. vertebrates.
Suppose a population splits into two descendant populations prior to any evolution of dark coloration, then splits again after the evolution of dark coloration. What is the scientific term used for this situation?
a. a homoplasy c. a synapomorphy b. an analogy d. a symplesiomorphy