A microorganism grows in the lab on medium containing mineral salts but no organic compounds. The organism is likely to be a(n)
A) heterotroph.
B) autotroph.
C) chemotroph.
D) chemoheterotroph.
E) The answer cannot be determined from the information provided.
B
Bloom's Taxonomy: Comprehension
Section: Growth Requirements
Learning Outcome: 6.1
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In all organisms, active transport across a membrane requires
A) equal concentrations of ions on both sides of the membrane. B) a resting potential of 0 mV. C) exergonic movement indicated by the direction of the electrochemical potential. D) an asymmetric distribution of ions across a membrane. E) both choices B and D
What did Mendel propose to explain the 3:1 ratio of dominant to recessive traits he observed in his pea plants?
a. Plants expressing dominant traits carry three copies of the genes for those traits versus only one copy for recessive traits. b. Plants with dominant traits were 300% more likely to survive to maturity after fertilization when they could be observed. c. Each plant had two copies of each trait, and recessive traits were only expressed if both copies were the recessive form. d. All pea plants contain the same genetic material, but dominant pea plants express traits three times more strongly than others.
Jean-Luc Eiselé and his coworkers used ______ receptors in their research on neurotransmitter
receptor function.
a. African clawed frog b. toad c. artificial d. dog e. human
On chromosomes within an individual, there are ________ alleles for a given gene found on ________ chromosomes.
a. two; homologous b. four; maternal c. four; paternal d. two; Y