#Question id: 10655
#Section 1: Ecology
Which of the following statements about the evolution of life histories is correct?
A) Unstable environments with unlimited resources favor r-selected populations.
B) K-selected populations are most often found in environments where density-independent factors are important regulators of population size.
C) Most populations have both r- and K-selected characteristics that vary under different environmental conditions.
D) The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities.
#Question id: 4943
#Section 2: Evolution
In what way were conditions on the early Earth of more than 3 billion years ago different from those on todayʹs Earth?
#Question id: 12674
#Section 5: Applied Ecology & Evolution
#Question id: 12339
#Section 1: Ecology
#Question id: 11777
#Section 2: Evolution
Some of the species of stalk-eyed flies are sexually dimorphic, with males having eye stalks up to twice as long as those in females. This gender difference in eye span results from selection by females on the expression of this trait in males, a process called __________.