Question

can you answer thee
Siblings have similar traits because they inherit those traits from a common ancestor. How is this similar to some evidence for evolution?
Similarities can be seen between siblings in species today, which shows common ancestry.
Similarities can be seen among related organisms, which shows common ancestry.
There are many differences between siblings in species today, which shows common ancestry.
There are many differences between related organisms, which shows common ancestry.

Dogs have a reduced nonfunctional digit on their paws known as a dewclaw. What is this an example of?
analogous structure
homologous structure
vestigial structure
mutated structure

Which kind of evidence studies mineralized bone, footprints, or organisms trapped in amber to determine common ancestry?
fossils
analogous structures
homologous structures
molecular clock

Australopithecus is an ape that lived in trees, but could walk on two feet. How might fossils from Australopithecus provide evidence for evolution?
Australopithecus is a fossil that is used to date other Precambrian fossils.
Australopithecus provides evidence of the existence of apes, but not humans.
Australopithecus is a transitional form between apes and humans.
Australopithecus provides evidence that humans existed.

Whales have what seem like remnants of a pelvis and femur, as shown here.

An x-ray image of a whale tail. The pelvis and femur bones are shown.

What are these structures an example of?
transitional structures
analogous structures
vestigial structures
adapted structures

Answer 1

1) How is this similar to some evidence for evolution?
Answer: Similarities can be seen among related organisms, which shows common ancestry.
Why: Shared traits among related species indicate they inherited those traits from a common ancestor.

2) Dogs' reduced nonfunctional digit (dewclaw) — what is this an example of?
Answer: vestigial structure.
Why: It’s a reduced feature that no longer serves its original function.

3) Which evidence studies mineralized bone, footprints, or organisms in amber?
Answer: fossils.
Why: Those preserved remains or traces are fossil evidence used to infer past life and relationships.

4) How might Australopithecus fossils provide evidence for evolution?
Answer: Australopithecus is a transitional form between apes and humans.
Why: Its mix of tree-climbing ape traits and bipedal features shows an intermediate stage in human evolution.

5) Whale remnants of pelvis and femur — what are these?
Answer: vestigial structures.
Why: They are reduced remnants of ancestral hindlimbs that no longer serve the original function.