What species concept is most useful for categorizing species that look similar and have similar niches but exist in populations that don't overlap?
A. Morphological species concept
B. Phylogenetic species concept
C. Ecological species concept
D. Biological species concept
Answer: B. Phylogenetic species concept
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When sea turtle eggs hatch, predators gather and mortality among the hatchlings is extremely high. Once turtles reach adult size, they can live for decades. This is an example of type ____ survivorship
Fill in the blank with the appropriate word.
The plant growth response to touch is known as
A) gravitropism. B) geotropism. C) thigmotropism.
Fred Griffith studied two strains of Streptococcus pneumonia, one that causes a lethal infection when injected into mice, and a second that is harmless
He observed that pathogenic bacteria that have been killed by heating can no longer cause an infection. But when these heat-killed bacteria are mixed with live, harmless bacteria, this mixture is capable of infecting and killing a mouse. What did Griffith conclude from this experiment? (a) The infectious strain cannot killedby heating. (b) The heat-killed pathogenic bacteria "transformed" the harmless strain into a lethal one. (c) The harmless strain somehow revived the heat-killed pathogenic bacteria. (d) The mice had lost their immunity to infection with S. pneumoniae.
Scarlet fever is caused by strains of
A. Staphylococcus aureus. B. Staphylococcus epidermidis. C. Staphylococcus saprophyticus. D. Streptococcus pyogenes. E. Streptococcus agalactiae