The observable expression of the genes present is called  

A.  genotype
B.  karyotype
C.  epistasis
D.  phenotype


D.  phenotype

Biology & Microbiology

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Which of the following is a Gram-negative bacterium that acts as a predator on other Gram-negative bacteria, and might be used to control populations of Gram-negative human pathogens in locations such as poultry farms?

A. Salmonella enteritidis B. E. coli C. Vibrio choerae D. Bdellovibrio

Biology & Microbiology

Bread mold can grow in a minimal medium without supplements (wild type) while certain mutated strains (mutants) can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis:

minimal ------> ornithine -------> citrulline ------> arginine, where enzyme 1 converts the precursor to ornithine, enzyme 2 converts ornithine to citrulline, and enzyme 3 converts citrulline to arginine. Which of the following would be TRUE of a strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone? A. The strain would have a mutation in the gene that encodes enzyme 1. B. The strain would have a mutation in the gene that encodes enzyme 2. C. The strain would have a mutation in the gene that encodes enzyme 3. D. The strain would have a mutation in the gene that encodes for enzymes 1, 2, and 3. E. The strain would be the wild type with no genetic mutations.

Biology & Microbiology

All of the following are examples of nonmuscle motility and contractility except

A) microsome formation. B) pseudopodia formation. C) cytoplasmic streaming. D) actin polymerization of Listeria. E) phagocytosis.

Biology & Microbiology

What is the correct sequence for the development of a eudicot embryo?a. Globular stageb. Heart stagec. Proembryo staged. Mature embryoe. Zygote formsf. Torpedo stage

A. d - e - a - b - f - c B. e - c - a - b - f - d C. e - b - c - a - f - d D. d - a - e - b - f - c

Biology & Microbiology