What are the three animal phyla that dominate animal life on land?
A. Platyhelminthes, Nematoda, Arthropoda
B. Cnidaria, Mollusca, Platyhelminthes
C. Nematoda, Chordata, Cnidaria
D. Porifera, Arthropoda, Nematoda
E. Mollusca, Arthropoda, Chordata
Answer: E
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Korarchaeota ____
a. includes halophiles b. includes psychrophiles c. diverged very early in Archaean evolution d. includes halophiles and thermophiles e. diverged very late in Archaean evolution
A relationship which benefits flow both ways
between the interacting species is
a. a neutral relationship. b. commensalism. c. competition. d. mutualism. e. parasitism
________ selection and ________ selection tend to reduce the amount of variation in a population, whereas ________ selection tends to increase the amount of variation in a population
Fill in the blank(s) with correct word
If SSB is not present during DNA replication, what would you expect to see?
A) The replisome complex would not assemble on the oriC region. B) The DNA cannot bend, so hydrogen bonds in the 13-mer region of oriC remain intact. C) Helicase activity is inhibited, so DNA strands cannot be separated. D) SSB carries the helicase protein to the open region of DNA, so hydrolysis and strand separation will not occur. E) SSB prevents reannealing of the separated strands, so strands would quickly reanneal and DNA replication cannot proceed.