A scientist is interested in doing a research project on hemoglobin. From which one of the following could he extract the hemoglobin for his study?
A) globulins
B) white blood cells
C) platelets
D) clotting proteins
E) red blood cells
E
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How can humans perceive multiple sounds at once?
a. Each portion of the basilar membrane vibrates at a unique frequency, and multiple regions can be stimulated at the same time. b. The more frequencies of sounds that are present, the further the sound travels into the cochlea. c. We have two ears, each perceiving a subset of frequencies in the environment. d. The fluid in the middle ear can transmit multiple frequencies to the oval window. e. Sounds reaching the left or right ear result in different nerve impulses.
Every cell is descended from another cell. This idea is part of _____
a. evolution b. the theory of heredity c. the cell theory d. cell biology
Which cellular protein is found in desmosomes?
A) tubulin B) occludins C) dynein D) cadherins E) connexons
A(n) transposon is a DNA sequence that “jumps” into the middle of a gene
__________________ Indicate whether the statement is true or false.