R-organisms reproduce at a very high rate. knowing this, why dont they usually reach their capacity? a. they live in environments with many predators that feed on themb. they r regularly killed off by disease and or droughtc. their life span is too shortd. a and b only

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.