Over evolutionary time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?
A) Natural selection cannot account for losses, only for innovations.
B) Natural selection accounts for these losses by the principle of use and disuse.
C) Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits.
D) The ancestors of these organisms experienced harmful mutations that forced them to find new habitats that these species had not previously used.
A plot of trophic diversity across the major groups of organisms shows highest trophic diversity amo
Adults in late middle adulthood frequently look forward to spending more time with their partner
The evolutionary significance of “Man the Hunter” (or in this instance “Man the Fisher”) has been de
Jaundice seen in the eyes and the skin of a patient with hepatitis A.
Elements Found in Organisms
Light-reflecting Eyes