A probable sequence of the evolution of cells was
A. autotroph ® aerobic heterotroph ® anaerobic heterotroph.
B. anaerobic heterotroph ® aerobic heterotroph ® autotroph.
C. anaerobic heterotroph ® autotroph ® aerobic heterotroph.
D. aerobic heterotroph ® autotroph ® anaerobic heterotroph.
C. anaerobic heterotroph ® autotroph ® aerobic heterotroph.
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Which of these terms defines how the organism allocates resources to growth, reproduction, and activities or structures related to survival?
A) survivorship B) life history C) energy budget D) demography
The role of a tumor suppressor protein in a cell is to ____
a. promote cell division of healthy cells b. inhibit cell growth and division c. promote cell division of abnormal cells d. trigger DNA replication in preparation for cell division e. serve as a cell receptor for growth factors
Eukaryotic cells can't simply split in two because _____.
A) their DNA is contained within a single nucleus B) they have a single mitochondrion that must first be replicated C) eukaryotic organelles must be equally divided among the daughter cells D) all of the choices make simple fission unworkable
Lymphocyte receptors are encoded by genes that are assembled by rearrangement and mutation of what molecules?
A. DNA B. pre-mRNA C. tRNA D. mRNA