Who demonstrated the possibility of producing
organic compounds from gases and water if the
mixture is exposed to energy?
a. Stanley Miller
b. Thomas Brock
c. Australian researchers
d. Jeon Kwang
e. Lynn Margulis
Answer: a
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In plants, which of the following are produced by meiosis?
A) haploid sporophytes B) haploid gametes C) diploid gametes D) haploid spores E) diploid spores
Lactobacillus grows optimally at ________ pH.
A. slightly alkaline B. very acidic C. neutral D. slightly acidic
Which statement is NOT true about echinoderms?
A. The exoskeleton is made of spiny plates. B. Larvae are free-swimming and bilaterally symmetrical. C. A water vascular system allows the tube feet to produce suction. D. Gas exchange occurs through skin gills and tube feet. E. Symmetry is radial in the adult, usually with parts in fives or multiples of five.
What is most critical for understanding the minimal gene set and the origin of life?
a. the number of genes b. the functions of the genes c. the stable environments of bacteria with the most reduced genomes d. the identity of genes involved in fatty acid/lipid metabolism to understand the origin of cell membranes