comp practice Bio 2

What are the two reactants for photosynthesis?

• sun

• water

• oxygen gas

• carbon dioxide

Photosynthesis goal is to

• make sugar

• make water

• make O2 gas

• make carbon dioxide

If a plant produces 3,000 Kcal, is eaten by a rabbit which is then eaten by a hawk, how many Kcal does the Hawk get?

• 10%

• 30

• 3

• .3

What is the most likely reason these fish have adapted to have different fin shapes?

• It helps the fish to have more friends.

• It helps the fish to survive in their environment.

• It does not help the fish in any way.

• It helps the fish attract more predators.

Organisms with advantageous adaptations are more likely to survive and reproduce than organisms without the advantageous adaptations. This phenomenon is known as natural selection. In order for natural selection to occur,

• one population must become extinct so another can be created.

• organisms within a population must have some genetic variation.

• there must be more male organisms than female organisms.

• all of the organisms within a population must be exactly the same.

According to Darwin’s theory of natural selection, individuals who survive are the ones best adapted for their environment. Their survival is due to the

• possession of adaptations developed through use.

• possession of inherited adaptations that maximize fitness.

• lack of competition within the species.

• choices made by plant and animal breeders.

Which word is used to describe the biotic factors found in an ecosystem?

• Population

• community

• species

• biome

Which of these has its own circular strand of DNA

• ribosomes

• mitochondria

• nucleus of eukaryotes

• Golgi body

which is a protein monomer?

• 
• 
• 
• 

The diagram is intended to show relationships in an ecosystem. What do the arrows represent?

• The direction of population migration
• Differences in dietary habits
• Progressively smaller organisms
• The direction of the energy flow