DCFA#3 Review CFB Biology

DIffusion is the movement of particles from ______ concentration to _______ concentration.

• high, low

• low, low

• high, high

• low, low

Which is most closely related to Lobefins Coelacanth?

• mammals

• teleosts

• no way to know

• Rayfins

The best way to know relationship between species is...

• amino acid sequences in DNA

• Analogous Structures

• Vestigial Structures

• Homologous Structures

Darwin theorized that species changed...

• gradually over time

• suddenly

• rarely if at all

• rapidly where we can see the changes

Why are some antibiotics not as effective over time?

• Some bacteria are naturally resistant to the antibiotics. They survive and reproduce, creating more bacteria that is resistant.

• All of the bacteria is able to change it's ability to fight the antibiotics.

• The bacteria that isn't resistant dies.

• Antibiotics just naturally lose their effectiveness from being exposed to the atmosphere.

If a certain fur color helps an organism camouflage in its environment, what would you expect to see over time?

• More organisms with that fur color.

• Fewer organisms with that fur color.

• No change in how many organisms have that fur color.

• There is no way to predict this.

How does mimicry help an organism?

• The organism's predators and prey see them with the advantages of the species they are mimicking.

• They enjoy getting to look like another organism.

• It enables them to breed with the species they are mimicking.

• It allows them to go for longer periods of time without food.

When life grows back over time after a forest fire or hurricane, this is...

• secondary succession

• primary successsion

• secondary re-growth

• primary dependence

Natural selection says that these tyoes of traits will be passed to offspring and become more common.

• desirable

• disadvantageous

• unhelpful

• hereditary

Primary succession begins with ....

• rock

• soil

• climax community

• existing soil