In the Last 20 Years One Concern of Scientists Who

question 45

Multiple Choice

In the last 20 years one concern of scientists who study amphibians is that

• A)genetic diversity is being increased too rapidly for proper maintenance.
• B)the edge effects are causing declines in species numbers.
• C)DDT is affecting reproduction by thinning the egg membranes.
• D)populations are diversifying rapidly and speciation is occurring.
• E)many species are declining or have gone extinct in recent years.