USA 7

The genetic code...

• Has no information

• Is a universal code that suggests evolution has happened

• Structure is very different between species

• Does not exist

The table suggests that

• All have mutations

• The organisms have no DNA

• Have identical DNA strands

• All organisms have the same 4 nitrogenous bases

Which structures are considered homologous structures?

(PICK 3!)

• Human

• Butterfly

• Shark Fin

• Bat Wing

• Whale

The cladogram shows that...

• Tortoise and House cat are the most related

• The wolf can pur

• They all have a common ancestor

• The house cat has no hair

Embryology (embryonic development)

• Compares DNA sequences of organisms

• Shows embryos look similar from closely related organisms

• Does not show a relationship between organisms

• Compares body parts of organisms

Spikey and Smooth trilobites are shown on the picture, what does this table suggest?

• The smooth trilobites are younger and the spikey trilobites are older

• The smooth trilobites could not adapt to the environment, only the spikey ones were able to adapt

• Both trilobites ate the same food and only the spikey ones were better at competing for it

• The smooth trilobites dug deeper into the ground than the spikey ones

A finite supply (a limit of supplies) of environmental resources is important because?

• Natural selection doesn't happen

• Organisms survive competition and don't reproduce

• Limited resources pressure organisms to compete

Deciduous trees in Texas lose their leaves in the winter months. This is regulated by how much sunlight there is during the day. what advantage does this adaptation have?

• The leaves falling protect them from organisms eating the leaves

• Leaves fall when less photosynthesis happens, which saves the tree energy

• Trees can produce more food during the winter because of this

• The leaves won't freeze if they fall off

There are two species of roses on separate sides of a mountain, over time some animals migrate from one side to another and pollinate the roses. This movement of pollen is called? (hint: pollen is plant alleles)

• Replication

• Gene flow

• Transcription

• Mutation