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The two part scientific name for an organism is based on which taxa for classification?
Genus species
If we start with 100 atoms of a radioactive substance, how much will remain after 3 half lives?
100 atoms--> 50 atoms --> 25 atoms --> 12.5 atoms remain
List the three domains in our current classification system.
Eukarya, Archea, Bacteria
Explain what a cladogram is and how organisms are organized onto it.
A cladogram is a diagram that shows the evolutionary relationships among organisms; they're plotted as branches based on derived characteristics that are shared
Describe the greenhouse effect.
This is when gases in the atmosphere build up and act as a blanket to the earth, preventing heat from escaping into outer space.
Why are fossil fuels nonrenewable?
They form over millions of years.
Define ecology.
branch of biology that deals with the interactions among organisms and their environments
Define behavior.
The way an organism reacts to stimuli in its environment.
What happens during each of the following phases of interphase: G1, S, and G2?
G1- cell growth
S- DNA synthesis
G2- prepare for mitosis
What is the probability that 2 heterozygous parents will have a homozygous offspring?
50%
Compared to complete dominance, how do co-dominant alleles affect the phenotypes of organisms?
They increase the number of different phenotypes that are possible.
How is meiosis 1 different from meiosis 2?
Interphase occurs before meiosis 1, but does not occur before meiosis 2.
What aspect of Lamarck's ideas about evolution was incorrect?
He believed that acquired characteristics could be passed on from parent to offspring.
What is a vestigial structure?
A structure or body part that once had a purpose, but is not currently used by a species
