A paleontologist is studying a group of fossils from its first appearance in the fossil record to its extinction. She determines that the group descends from a single common ancestor and gave rise to no new species
Its appearance is distinct from any other group of fossils. Based
on this information, she decides that it is a new species. In coming to this decision, which
species concept or concepts is she using? Select all correct choices
A. biological species concept
B. morphospecies concept
C. evolutionary species concept
D. ecological species concept
E. none of these
B,C
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The relationship between photosystem I (PSI) and photosystem II (PSII) is correctly described by which of the following statements?
A) PSI absorbs only short wavelengths of light. B) Electrons are excited by PSI or PSII, but not both. C) PSI is designated P700, whereas PSII is designated P680. D) The absorption maximum of PSII is 700 nm. E) The absorption maximum of PSI is 680 nm.
If a DNA template strand has a sequence of 3? TACAATGTAGCC 5?, the RNA produced from it will be which sequence?
A. 3?TACAATGTAGCC5? B. 5?ATGTTACATCGG3? C. 5?AUGUUACAUCGG3' D. 3?AUGUUACAUCGG5? E. 3?ATGTTACATCGG5?
Four of the following statements about Neanderthals are true. Which statement is false?
a. Neanderthals diverged from modern humans around 500,000 years ago. b. Neanderthals lived in Europe and the Near East. c. Neanderthals are direct ancestors of Homo sapiens. d. Neanderthal brains may have been larger than those of modern humans. e. Neanderthals have no modern descendants.
Which of the following is NOT a function of the vertebrate urinary system?
A) Eliminating cellular wastes B) Regulating body temperature C) Maintaining blood pH D) Adjusting water and ion concentrations E) Secreting hormones