Which one of the following helps make ecosystems more stable?
A. biodiversity
B. bacteria
C. stable amounts of sunlight
D. rainfall
Answer: A
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The most frequent kind of mutation, point mutations, occur when (select all that apply)
A. a single base pair is replaced by another B. DNA repair mechanisms fail during replication. C. open reading frames are altered. D. a block of nucleotides are rearranged. E. none of these
In prokaryotes that carry out aerobic respiration, the ________ serves the same purpose as the inner mitochondrial membrane and the ________ serves the same purpose as the mitochondrial matrix
A) ribosomes; plasma membrane B) cytoplasm; plasma membrane C) cytoplasm; cell wall D) cytoplasm; nucleoid E) plasma membrane; cytoplasm
Who is responsible for the first concept regarding the passing on traits or characteristics that were acquired during the
lifetime of an organism to its offspring? a. Charles Lyell b. Charles Darwin c. Alfred Wallace d. Thomas Malthus e. Jean Baptiste de Lamarck
A suggested and testable explanation for an event is called a ________.
a) control b) theory c) hypothesis d) variable