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DNA sequences in many human genes are very similar
Humans and chimpanzees share a
to the sequences of corresponding genes in chimpanzees.
relatively recent common ancestor
The most likely explanation for this result is that
It has been observed that organisms on islands are
different from, but closely related to, similar forms Island forms and mainland forms
found on the nearest continent. This is taken as evidence descended from common ancestors
that
Of the following anatomical structures, which is
Flipper of a cetacean
homologous to the wing of a bird?
In Darwin's thinking, the more closely related two More recently they share a common
different organisms are, the ancestor
A mechanism for evolution that was
Charles Darwin was the first person to propose
supported by evidence
, Which naturalist synthesized a concept of natural
Alfred Wallace
selection independently of Darwin?
Darwin's mechanism of natural selection required long
time spans in order to modify species. From whom did Charles Lyell
Darwin get the concept of Earth's ancient age?
Tropical grasslands with scattered trees are known as Savannas
Which biome is able to support many large animals
Savanna
despite receiving moderate amounts of rainfall?
Which of the following organisms is the most likely
Land snail
candidate for geographic isolation?
The main reason polar regions are cooler than the Sunlight strikes the poles at a lower
equator is because angle
Which of the following is responsible for the summer
Water is densest at 4 celsius
and winter stratification of deep temeprate lakes?
In temperate lakes, the surface water is replenished with
Autumn and spring
nutrients during turnovers that occur in the
Which of the following abiotic factors has the greatest
Temperature
influence on the metabolic rates of plants and animals?