Bio 204 Week 6
1. When several possible phylogenetic trees can be produced from a data set,
the MOST parsimonious tree is the one that shows the:
largest number of nodes.
largest number of analogous characteristics.
smallest number of evolutionary changes.
smallest number of branches.
smallest number of synapomorphies.: smallest number of evolutionary changes.
2. How do mass extinction events influence subsequent species composition
and diversity?
by immediately increasing species diversity
1/8
, by eliminating smaller organisms instead of larger organisms
by reducing competition among surviving organisms
by permanently altering climate: by reducing competition among surviving organisms
3. The probability that an ancient species will be represented in the fossil record
is a function of:
The properties of the climate in which they live, such as how warm or cold it
was.
The properties of the organisms themselves, such as whether or not they make
hard skeletons.
The properties of the environments in which they live, such as whether or not
2/8
1. When several possible phylogenetic trees can be produced from a data set,
the MOST parsimonious tree is the one that shows the:
largest number of nodes.
largest number of analogous characteristics.
smallest number of evolutionary changes.
smallest number of branches.
smallest number of synapomorphies.: smallest number of evolutionary changes.
2. How do mass extinction events influence subsequent species composition
and diversity?
by immediately increasing species diversity
1/8
, by eliminating smaller organisms instead of larger organisms
by reducing competition among surviving organisms
by permanently altering climate: by reducing competition among surviving organisms
3. The probability that an ancient species will be represented in the fossil record
is a function of:
The properties of the climate in which they live, such as how warm or cold it
was.
The properties of the organisms themselves, such as whether or not they make
hard skeletons.
The properties of the environments in which they live, such as whether or not
2/8
