A ______ is a regulatory molecule that is secreted into the blood by an endocrine gland.
A. metabolite
B. hormone
C. peptide
D. G protein
E. neurotransmitter
B. hormone
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A test offered on the Web by a direct-to-consumer genetic testing company genotypes a gene for ability to taste bitter substances. This test is not regulated by the Clinical Laboratory Improvement Amendments (CLIA) because
A) the test is not expensive. B) the test provides information, not a diagnosis. C) the test is offered in a state of the U.S. not covered by these regulations. D) the Genetic Information Nondiscrimination Act outlawed CLIA. E) it is not accurate.
Which of the following is true of transposable elements (TEs)?
a. Humans are one of a few organisms that do not contain TE DNA in their genomes. b. All TEs make a copy of themselves that inserts into a new location (copy and paste). c. All TEs are removed from one location before moving to another (cut and paste). d. TEs can be mutagenic. e. The site into which a TE inserts itself is homologous to the TE itself.
The female gametophyte is the
a. flower. b. ovule. c. embryo sac. d. carpel. e. ovary.
Multicellular haploid organisms
A) are typically called sporophytes. B) produce new cells for growth by meiosis. C) produce gametes by mitosis. D) are found only in aquatic environments. E) are the direct result of fertilization