The diversity of protists has increased along with the diversity of animals and plants
A. true
B. false
A
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In all vertebrates with four-chambered hearts, the ________ receives oxygenated blood directly from the ________.
A. left ventricle, left atrium B. left ventricle, lungs C. right ventricle, right atrium D. right ventricle, lungs E. left atrium, left ventricle
Skin cells, blood cells, and other cell types that are continually replaced arise from:
a. adult stem cells b. embryonic stem cells c. induced pluripotent stem cells d. differentiated cells of the same tissue type e. gamete cells
Certain cell types in humans, such as skeletal muscle cells, have several nuclei per cell. Based on what we know about mitosis, how could this happen?
a. The cell undergoes repeated mitosis with associated cytokinesis. b. The cell undergoes repeated cytokinesis, but not mitosis. c. The cell undergoes anaphase twice before entering telophase. d. The cell undergoes repeated mitosis, but not cytokinesis.
A mutation that affects the genotype of the organism but not the phenotype is called a
a. nonsense mutation. b. missense mutation. c. frameshift mutation. d. silent mutation.