Week 4 Recitation Practice

A hypothesis SHOULD:

• include information about the specific experiment you will use to test it

• Contain a "because" statement that provides an explanation

• Use circular logic as part of its explanation

• Include information about the initial observation

Conlan wants to answer the question, “Does phosphorus affect tomato fruit production?” Which statement represents a hypothesis that he can test to answer his question?

• Phosphorus will affects tomato fruit production, because tomatoes that are fertilized with phosphorus will have longer leaves

• If phosphorus affects tomato fruit production, then phosphorus should be added to the soil during planting.

• If phosphorus affects tomato fruit production, then adding phosphorus to the soil will make tomatoes taste better since tomatoes are tasty.

• Phosphorus will increase tomato fruit production more than not using phosphorus because phosphorus acts as a nutrient converter to aid in growth.

Our current understanding of evolution is called a theory because it has been

• supported repeatedly as new discoveries have been made

• proven to be exactly true as originally proposed.

• corroborated by data that were gathered during a single experiment.

• developed from the postulates of many scientists.

A prediction SHOULD:

• Include information about the specific experiment you will use to test it

• NOT contain a “because” statement that provides an explanation

• include the dependent and independent variable

• Not include specifics about the experiment

If given the following hypothesis: Clownfish typically utilize less venomous anemone host species rather than more venomous hosts because their mucus coating provides insufficient protection from the more potent venom. Which is a good prediction for this hypothesis?

(White is more venomous than Green anemones)

• Clownfish will spend more time in green anemones than in white anemones.

• Clownfish will visit green anemones more frequently than white anemones because their mucus coating provides insufficient protection from the more potent white anemone venom.

• Clownfish will visit green anemones more frequently than white anemones.

• Green anemones will have a greater frequency of clownfish visitors per hour than white anemones.

What formula is used to quantify population phenotypic variations?

What is the Vp in a population of three identical twins raised in identical environments?

• Vp>0, h²>0

• Vp<0, h²>0

• Vp=0; h²=0

• Cannot determine Vp, but h² is 1.