Which uterus layer is highly elastic and allows the accommodation of a nine-month-old fetus?
A. Endometrium
B. Myometrium
C. Exometrium
D. Hypometrium
B. Myometrium
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Which statement regarding porphyrin synthesis pathways is CORRECT?
A. The succinyl-CoA/glycine porphyrin pathway is used by all bacteria, photosynthetic eukaryotes, and archaea. B. The porphyrin biosynthetic pathways are unified at the step of 5-aminolevulinic acid. C. The glutamate porphyrin pathway is used by all non-photosynthetic eukaryotes and alpha-proteobacteria. D. There is very little conservation of porphyrin synthesis pathways between eukaryotes, bacteria, and archaea.
You begin an experiment with two populations of E. coli that are each composed of 100 cells. The cells are all genetically identical (i.e., they are clones). You grow them up in flasks on a lab bench under identical conditions with unlimited resources
After 10,000 generations, you analyze the genome of each population. Do you expect the genomes of each population to be identical after 10,000 generations? A. Yes, because the starting populations were genetically identical. B. Yes, because resources were unlimited. C. No, because mutations will accumulate independently in each population. D. No, because natural selection was not a factor at any point in this experiment. E. No, because mutation and natural selection (once genetic variation is present) were factors in this experiment.
The ticks of a genetic clock are measured by the
A. number of random mutations. B. number of dead cells. C. amount of RNA. D. amount of DNA.
Neanderthals are best described as
A) direct ancestors to modern humans. B) direct ancestors to modern Europeans but not to other human populations. C) a localized form or subspecies of Homo sapiens that was well adapted to living in caves and carrying clubs. D) a hominin that colonized Europe independently of Homo sapiens and that interbred with modern humans.