If an organism with a particular genotype fails to produce the corresponding phenotype, the organism is said to be ________ for the trait
Fill in the blank(s) with correct word
nonpenetrant
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An infection of the membranes covering the brain is called
A. encephalitis. B. meningitis. C. arachnitis. D. ventriculitis.
Study of the origin of life has resulted in the breakdown of cellular development into overlapping stages, beginning with the synthesis of precursor molecules for the synthesis of nucleotides and amino acids and ending in polymers enclosed in membranes acquiring cellular properties. Which of these stages were a focus of study for Miller and Urey in their FIRST experiment?
A. Stage 1: Nucleotides and amino acids were produced prior to the existence of cells. B. Stage 2: Nucleotides became polymerized to form RNA and/or DNA, and amino acids became polymerized to form proteins. C. Stage 3: Polymers became enclosed in membranes. D. Stage 4: Polymers enclosed in membranes acquired cellular properties. E. Stage 5: Ribosomes were developed inside the membrane.
Which of the following has occurred in cloned
animals?
a. lung problems b. liver problems c. limping d. heart problems e. all of these have occurred in cloned animals
What name is given to bonds that involve the sharing of electrons?
A) covalent B) hydrogen C) ionic D) polar