Bio 2 Exam 1 Tuesday Prep Quiz

What subjects do you feel the least confident in?

• Scientific Method

• Ecology

• Plants

• Cell Function

• Homeostasis

Which of these is a hypothesis?

• Mammalian color vision is derived from cone cells sensitive to 3 green, red and blue

• The earth has shifted over time to to patterns of tectonic shifts

• Before our universe came into existence there was a giant sea turtle that held worlds on its back

• If you throw a ball at a specific velocity it will hit the target 80% of the time

Answer explanation

A hypthesis must be testable and falsifiable. It is important to thus note that certain classes of assumptions are non-testable due to a lack of data.

Why is it important that a Hypothesis be testably falsifiable?

Answer explanation

Mainly so as to find new iterations of possibilities to note where the hypothesis is correct or incorrect.

What differentiates a Theory from a Hypothesis?

Answer explanation

Mainly, scale and generality.

Both are propositions of how or why something happens but a Theory explains how any iteration of events within its scope could happen while a Hypothesis is much more contextual to a specific version of a phenomena.

Ex. General relativity explains the relativity of motion and observation for any object in a gravitational field.

A hypothesis would say that due to gravity a apple would fall at a set rate and hit the ground at a set time

If a test finds a exception to a theory, or rephrased finds new information that shows the theory doesnt extend its explanation out as much as previously presumed does that make the theory wrong?

Answer explanation

Not necessarily, specifcally so long as the premises and propositions remain correct within the scope of the theory it may be retained to explain its phenomena.

Key examples of this would be how our current theory of Evolution the Synthesis model , comes from theories of Natural Selection, Mendelian Inheritance, and Genetic Variation all combined as each component explained parts the others didnt cover.

What is Biotic Potential? How does it relate to Time to Reproduce and Population Growth?

Answer explanation

Biotic Potential is essentially the upper limit of an organisms ability to spread itself with the presumption of limitless resources/a lack of environmental resistance.

Time to Reproduce would affect the scale of biotic potential, with shorter timescales being directly related to higher potential levels.

What is environmental resistance? How does it relate to density independent and density dependent factors?

Answer explanation

Environmental resistance denotes phenomena and factors of existance that limit the ability of life to spread unchecked. Some of these factors are more impactful,like disease, when a population is more densely packed, while others have little bearing on population density.

What is the rule of 10, how does it relate to trophic levels?

A herd of reindeer live in a region recently depopulated of wolves. What shape would the growth of their population be?

Answer explanation

It would be a exponential increase, with a very sharp decline after they pass carrying capacity.

A/ An _______________ can represent energy available from one trophic level to the next.

• ecological pyramid

• biomass pyramid

• tertiary pyramid

• predator/ prey pyramid