What characteristics are consistent with a K-selected species? Where do humans fall on the r through
K continuum?
What will be an ideal response?
K-selected species tend to have larger body size, longer generations, and a lower reproductive rate.
More energy is devoted to each offspring so individual offspring have a higher chance of survival than
do r-selected offspring. Humans are K-selected, especially when compared to r-selected organisms like
houseflies or plants, which produce thousands of offspring. However, exponential growth is associated
with r-selected species.
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A microbial environment containing high nutrient concentrations is called an oligotrophic environment.
Answer the following statement true (T) or false (F)
The majority of cases of human plague in the United States occur in the northeastern states
Indicate whether the statement is true or false.
Geological evidence indicates that two landmasses, separated by a deep ocean channel, have been moving apart since 45 million years ago. You are studying a group of organisms that has widespread populations on both of the landmasses. Which is the most
likely hypothesis for the group's evolutionary history? A) The group's ancestors were definitely present on the original landmass. B) The group's ancestors cannot have been present on the original landmass. C) If the group's ancestors could not move across the open ocean, it is very likely that they were present on the original landmass. D) The group's ancestors must have independently colonized each of the landmasses from a third location within the past 45 million years.
How do enveloped animal viruses exit their host?
A. bursting the host cell B. rupturing the virus C. budding or exocytosis D. endocytosis