Half Life Problems and Microscope Math
Four lines on a millimeter ruler are visible (1 line at each end, the other two in between - sorry I can't insert an image), what is the DOF in micrometers?
3000 micrometers
define derived character
characteristic/trait shared by all members of a clade and only members of that clade
Define population density.
the number of individuals of a single species per unit of area
What is coevolution? Examples of why this might occur?
the influence of closely associated species on each other in their evolution - example reasons/situations include predation, parasitism, mutualistic relations
why sexual reproduction?
genetic variation, adaptation/evolution
The DOF is 675 micrometers and a baby starfish ray takes up 3/4 of the view. What is the size of the ray?
506 micrometers
physical/structural traits
Define carrying capacity.
The max number of organisms of a certain species that can be supported by an environment
What is mutualistic symbiosis?
Different kinds of organisms living closely together that work together to the benefit of both sides.
What are the symbiotic relationships?
Mutualism, where both benefit; commensalism, where one benefits and the other is unaffected; and parasitism, where one benefits and the other is harmed
A microscope has the magnification of 40x at low power and 150x at medium power. The DOF at low power is 4.8 mm. What, in micrometers, if the DOF at medium power?
1280 micrometers
Define common ancestor.
A population of individuals that the group/species of interest descended with modification
Define and give an example of a density independent limiting factor
Saying provided to learn taxonomy categories and their order?
Dumb Kids Playing Catch On Freeway Get Smashed
During what stage of meiosis does crossing over happen?
Prophase
Barium-122 has a half life of 2 minutes. There are 80 grams. How much is left after 10 minutes?
2.5 grams
Define gradualism.
The evolution of species slowly over long periods of time.
Define and give an example of a density dependent limiting factor.
Biotic factors, like predation, competion, parasitism, etc
Explain multi-drug resistant bacteria.
Someone is treated with antibiotics, which kills off most but not all of the illness. The remaining microorganisms are the most resistant. They then multiply, creating more super resistant bacteria and causing antibiotics to no longer work as treatment.
During what stage of meiosis are the chromosomes lined up?
metaphase
100 grams of carbon-14 decay, leaving 25 grams. How many half lives did the carbon go through and how many years did that take?
2 half lives and 11460 years
Define punctuated equilibrium.
Species remain unchanged for long periods of time, interrupted by short periods of evolutionary change
What does each of the survivorship curves indicate (1, 2, and 3)?
Taxonomy levels in order from biggest to smallest?
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
During what stage of meiosis are chromatids/chromosomes pulled apart?
Anaphase