Question 1
Potassium-40 can be used to date ________ that are ________ old.
a. fossils . . . thousands of years
b. potassium-rich fossils . . . millions of years
c. sedimentary rocks . . . hundreds of years
d. volcanic rocks and associated fossils . . . hundreds of millions of years

Question 2
Studies of skull structure suggest that the main genetic differences between humans and chimpanzees are
a. differences in the proteins our genes can produce.
b.due to the fact that humans have a greater total number of genes, which makes humans more complex.
c. due not so much to the genes themselves, but rather in how genes are expressed during development.

Question 3.
Scientists evaluating the Cretaceous mass extinctions have concluded that
a.many factors, including climate change, volcanic activity, and an extraterrestrial impact, may have played a role.
b. only an extraterrestrial impact could have caused such a big extinction event.
c. there is no evidence of increased volcanic activity during the late Cretaceous.

Question 4
The three-domain system
a. subdivides the prokaryotes into two different domains.
b. is based upon the presence or absence of cell walls.
c. subdivides the eukaryotes into two different domains.
d. no longer recognizes eukaryotes as a monophyletic group.

Question 5
How can a phylogenetic tree be used to make predictions?
a.Features shared between two groups are likely to have been present in their common ancestor.
b. Current trends of evolution will continue into the future. Complex models can be used to accurately predict future branching patterns and the nature of future adaptations.
c. An existing organism’s characteristics can be confidently assumed to fit the patterns in the tree.This procedure eliminates the need to collect data about organisms through direct observation or sampling.
d.Features found in one clade are likely to be found in other clades inhabiting different environments.

Question 6
Geologists have evidence that over the past 1.5 billion years,
a. Earth’s land masses have been entirely submerged in water on three occasions.
b.Earth’s land masses have joined into a single continent and split back apart again on three occasions.
c.Earth’s continents have remained essentially in their current shape and positions.

PLease help Im studying for a test. Please dont guess. Thank you so much in advance

Filed under: Potassium Rich

Like this post? Subscribe to my RSS feed and get loads more!