Evidence of Evolution

Front

Which of these structures are homologous? the wings of a bat and the wings of a moth, the hip bones of snakes, the lungs of a land mammal and the gills of a marine animal, the three long bones in a human arm and the three long bones in a cat's front leg

Back

the three long bones in a human arm and the three long bones in a cat's front leg

Front

Which conclusion can best be drawn from the diagram?

Back

The four animals may have evolved from a common ancestor.

Front

The bones in the wings of a bird, the flipper of a whale, and the arm of a human are

Back

homologous structures

Front

What is the primary evidence to show changes in species over long periods of time?

Back

fossil record

Front

Fossils of an extinct species of giant armadillo were found to be similar to a smaller species of armadillo presently inhabiting the same region. This similarity could be best explained on the basis of:

• modern forms have evolved from earlier forms
• inheritance of acquired traits
• use and disuse
• the heterotroph hypothesis

Back

modern forms have evolved from earlier forms

Front

The presence of feathers on some dinosaur fossils suggests that

Back

birds evolved from dinosaurs

Front

What do genome maps of a hedgehog and a sloth allow scientists to determine?

Back

How closely related the two species are to each other.

Front

Two nucleotide sequences found in two different species are almost exactly the same. What does this suggest?

Back

may have similar evolutionary histories

Front

The hindlimb bones of a whale are considered

Back

vestigial, left over structure

Front

What conclusion can you draw from the fact that many modern whale species have pelvic and leg bones?

Back

The ancestors of whales may have been land mammals