Cyanobacteria are so named because many species have a blue-green appearance caused by the photosynthetic pigment phycocyanin.
Answer the following statement true (T) or false (F)
True
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Blood contains
(a) dissolved gases. (b) dissolved nutrients. (c) dissolved hormones. (d) all of the above.
Which of the following would most likely contribute to uncontrolled cell proliferation (i.e., cancer)?
A. a mutant CDK that was active in the absence of its cyclin binding partner B. a mutant cyclin that cannot bind to its normal CDK binding partner C. a mutant microtubule synthesis/polymerization enzyme D. a mutant DNA replication mechanism causing extra chromosome copies E. a mutant kinetochore protein that causes reduced microtubule attachment
Which of the following statements is false?
A. The walls of the right ventricle are thicker than the walls of the left ventricle. B. Blood pressure in the pulmonary circulation is lower than blood pressure in the systemic circulation. C. The left ventricle pumps oxygenated blood, whereas the right ventricle pumps deoxygenated blood. D. The systemic blood pressure of a bird is much higher than that of a fish. E. None of the answer options is false.
What are structural homologies?
What will be an ideal response?