Biologically, which of the following is the least important characteristic of water?
A) Water molecules are polar.
B) Water molecules form numerous hydrogen bonds.
C) Water is a good solvent.
D) Water typically contains isotopes of hydrogen.
E) Water has a temperature-stabilizing capacity.
Answer: D
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You are studying 12 new isolates from the human skin. The isolates have 16S rRNA sequences that are 97% similar and share important phenotypic traits. Their genomes have 55% of their genes in common. The isolates would most likely be
A) classified as individual strains of the same species. B) classified as individual species of the same genus. C) split into different families. D) classified as the same species if they can mate via conjugation.
The scientific method involves formulating a tentative explanation, called the hypothesis, to account for what has been observed or measured.
Answer the following statement true (T) or false (F)
How do water moulds differ from true fungi?
a. Water moulds are haploid, while fungi are diploid. b. Water moulds form hyphae, while fungi form mycelia. c. Water moulds have a different genetic composition than fungi do.
In his studies of colonization of hard substrates by various subtidal invertebrates, Michael Keough made the interesting discovery that, among isolated bare patches, __________ more successfully colonized the larger patches.
A) the better competitors, tunicates and sponges, B) the disturbance-adapted species, bryozoans and polychaetes, C) the large predators, such as starfish, D) microbial films, consisting of bacteria and fungi,