In which of the following situations would speciation be most likely to occur?
A) A population of juniper shrubs is split in two by a canyon. Every year, strong winds carry a small amount of the shrubs' pollen across the canyon.
B) A Japanese mollusk species whose larvae are often carried from port to port in ship bilge (waste) water now flourishes in San Francisco Bay, a busy commercial port.
C) Bighorn sheep occupy mountains from Canada to Death Valley in Southern California, interbreeding all the way. The populations at the two ends of the range live in very different environments.
D) Seven monkeys escape from an enclosure. To everyone's surprise, they establish a small but viable population, coexisting successfully with humans in a partly suburban environment very different from their native African habitat.
Answer: D
You might also like to view...
Four of the five answers below are related as members of the same group. Select the exception
a. lactose b. maltose c. sucrose d. table sugar e. glucose
Chan's megastick is the longest known insect. How long is it?
a. 10 cm b. 20 cm c. 40 cm d. More than 50 cm
Answer the following statement(s) true (T) or false (F)
1. a muscle can generate more force during contraction if it has been pre-stretched 2. all muscles in the human body cross only one joint 3. a motor unit consists of a group of muscles that are innervated by the same motor neuron 4. if a second stimulus occurs in a motor unit before the first twitch has subsided, the muscle will not respond to the second stimulus 5. Ca ions that are released into the area surrounding the myofibrils promote cross bridge formation
Proteoglycans in the extracellular matrix of animal tissues ________________
(a) chiefly provide tensile strength. (b) allow cartilage to resist compression. (c) are linked to microtubules through the plasma membrane. (d) are polysaccharides composed of glucose subunits.