Question 25
An observer recorded the population sizes of two animals over time. The source says “for every 25 years”; the graph shows intervening fluctuations as well as 25-year date labels.
a) Is the relationship between A and B competition or predation?
b) Animal A has fur the same color as its surroundings. What advantage does this give it?
c) From 1950 to 1975, A’s population decreases while B’s is described as relatively constant. Give a reasonable explanation.
Graph labels: A population size (thousands), B population size (thousands); years 1900, 1925, 1950, 1975.
a) Is the relationship between A and B competition or predation?
b) Animal A has fur the same color as its surroundings. What advantage does this give it?
c) From 1950 to 1975, A’s population decreases while B’s is described as relatively constant. Give a reasonable explanation.
Graph labels: A population size (thousands), B population size (thousands); years 1900, 1925, 1950, 1975.