Which of the following observations helped 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 can be found on islands located farther from the mainland than the birds' 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.
Difficulties in applying the morphological species concept
Changes in cell shape due to alterations in intracellular fluid volume.
Shape of the spleen.
The cranium of a young infant changes dramatically in shape with age. Initially the child has severa
Mendel’s observations about segregation and independent assortment are explained by the behavior ...
Mole concept