Why are viruses not considered to be living organisms?
What will be an ideal response?
Viruses consist only of a nucleic acid molecule surrounded by a protein coat. They are not capable of
carrying out all the activities of life such as reproduction, response to external stimuli, growth, etc.
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The physical basis of life is/are ____________
a. carbon b. water c. carbon and water d. carbon, water, and silicon
The area labeled “A” is
a. a nucleus. b. chromatin. c. endoplasmic reticulum. d. a vacuole. e. a nucleolus.
What process occurs in cells that become more specialized in their function?
A) cleavage B) gastrulation C) differentiation D) fertilization
Genomic imprinting works by
A. blocking the cell's ability to read certain genes. B. activating the DNA polymerases so thymine is more readily attached to the lead gene. C. blocking the cell's ability to undergo cytokinesis. D. activating the DNA ligases so they can clip the attached methyl groups off.