Alfalfa plants occur symbiotically with bacteria that can convert nitrogen gas to ammonium in a process called ________
A) nitrification B) fertilizers C) nitrogen fixation D) nitroprocessing
Answer: C
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A contraceptive pill that continuously inhibits the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus will _____
A) increase the production of estrogen and progesterone by the ovaries B) initiate ovulation C) reduce the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary gland D) stimulate the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the posterior pituitary gland E) increase the flow phase of the menstrual cycle
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.
Which avenue of research is least likely to reveal whether asexual organisms form species?
a. analyzing whether a cluster of bacteria constitutes a species b. exploring various niches in which different populations reside c. looking into previously undiscovered types of bacteria d. performing genomic research e. hybridizing polyploid plants
Which of the following is the correct order for the taxonomic classification of living things?
What will be an ideal response?