You are presented with an organism that has not been identified previously. Which feature would identify it as a fungus?
A. flagella
B. cell wall
C. nonparasitic
D. absorptive nutrition
E. mycelia
E. mycelia
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Organisms categorized as osmoconformers are most likely _____
A) found in freshwater lakes and streams B) marine C) amphibious D) found in arid terrestrial environments E) found in terrestrial environments with adequate moisture
The receptor potential is
A. the membrane potential produced when a neurotransmitter molecule binds to its receptor. B. the membrane potential produced in the receptor cell by sensory transduction. C. the membrane potential produced by sensation. D. the electrical signal produced by perception. E. the membrane potential produced at a muscle cell.
Which of the following is NOT true about the Hardy-
Weinberg formula? a. It is helpful to doctors and genetic counselors. b. It can predict the carrier frequency of alleles known to cause genetic disorders. c. It can explain why some individuals absorb too much iron from their food. d. The math is useful in research on the effects of a mutant BRCA2 allele. e. It can predict that the frequency of hemochromatosis carriers in Irish populations is 0.24
Investigators performed nuclear transplant experiments to determine whether DNA is altered irreversibly during development. Which of the following statements about these experiments is true?
(a) Because the donor nucleus is taken from an adult animal, the chromosomes from the nucleus must undergo recombination with the DNA in the egg for successful development to occur. (b) The embryo that develops from the nuclear transplant experiment is genetically identical to the donor of the nucleus. (c) The meiotic spindle of the egg must interact with the chromosomes of the injected nuclei for successful nuclear transplantation to occur. (d) Although nuclear transplantation has been successful in producing embryos in some mammals with the use of foster mothers, evidence of DNA alterations during differentiation has not been obtained for plants.