Evolution 1

Comparing the bones pictured in this diagram can provide evidence to support which of the following conclusions?

• The humerus bone evolved separately in many different lines of animals.

• The size and position of various bones indicates how highly evolved an animal is.

• Fossil evidence of bones provides the strongest evidence for evolution.

• Humans, lions, and birds evolved from a common ancestor.

this evidence provides proof of what life existed in the past. These show animals that were once alive and now completely excitinct, and animals that still have living relatives today. The higher up the animal is in the rock, the more similar it is to todays species.

• Genetics

• fossil records

• anatomy

• patterns of distribution

this piece of evidence is shown by the similarites in all embryos. For example, all embryos have a pouch that develops into certain things. this similarity shows that all species came from similar beginnings

• molecular biology

• fossils

• anatomy

• embryology

Structures are similar in appearance but not in structure

• Vestigial 
• Homologous 
• Analogous Structures 
• Embryonic 

this is structures that are very similarly built, but used for different pourposes depending on how the species evolved

• Genetics

• homologous structures

• analogous structures

• anatomy

these are parts of animals that are used for the same purpose but are structurally very different

• anatomy

• analogous structures

• homologous structures

• embryology

this science studies DNA, and it proves everything came from similar ancestors because it shows all the similarities beings have in their fundamental DNA. for example, we all have proteins. the more similar the DNA between species, the more recent their common ancestor is.

• embryology

• Molecular biology

• anatomy

• genetics

When comparing the DNA of two different organisms, the more differences in the DNA base pairs the more-

• Closely related they are.

• Distantly related they are.

• It doesn't prove anything.

• They look alike.

The similarities of bone structure in the diagram provide evidence of what?

• The organisms probably use there forelimbs for the same thing.

• The organisms evolved from a common ancestor.

• The organisms have the same DNA.

• All vertebrate species have identical forelimbs.

The diagram shows fossils in different rock layers. Which of these statements about the age of these fossils is most likely correct?

• Fossil A and C are the same age

• Fossil B is older than fossil C

• Fossils A is older than fossil B

• Fossil D is older than fossil C

Answer explanation

The lower the layer, the older the layer. Therefore, fossils found in lower layers are older than the fossils found above them. Or you could say that fossils in the more shallow layers are younger than the fossils below them.