BYU BIO 250 (FINAL EXAM)
EXPECTED QUESTIONS WITH VERIFIED ANSWERS
Question 1.
Lecture 13
ANSWER
Question 2.
What are the four general categories of fossils?
ANSWER
1. Compression and impression fossils (ex: footprints left in wet cement)
2. Permineralized fossils - sediments and minerals precipitate in cells (ex: fossil trees, fossil
bones)
3. Casts and molds - when remains decay after being buried in sediment (ex: endocast of
brain)
4. Unaltered remains - specimen in peat bogs, frozen, mummified, etc. (ex: wooly mammoth
frozen solid in ice, humans in peat bogs)
Question 3.
What are the three major weaknesses in the fossil record?
ANSWER
1. Geographic
2. Taxonomic (certain species are more likely than others)
3. Temporal (things that lived 1 billion years ago)
Question 4.
How can we know how old some- thing is?
ANSWER
relative dating and absolute dating
Question 5.
Types of relative dating
ANSWER
1/3
EXPECTED QUESTIONS WITH VERIFIED ANSWERS
Question 1.
Lecture 13
ANSWER
Question 2.
What are the four general categories of fossils?
ANSWER
1. Compression and impression fossils (ex: footprints left in wet cement)
2. Permineralized fossils - sediments and minerals precipitate in cells (ex: fossil trees, fossil
bones)
3. Casts and molds - when remains decay after being buried in sediment (ex: endocast of
brain)
4. Unaltered remains - specimen in peat bogs, frozen, mummified, etc. (ex: wooly mammoth
frozen solid in ice, humans in peat bogs)
Question 3.
What are the three major weaknesses in the fossil record?
ANSWER
1. Geographic
2. Taxonomic (certain species are more likely than others)
3. Temporal (things that lived 1 billion years ago)
Question 4.
How can we know how old some- thing is?
ANSWER
relative dating and absolute dating
Question 5.
Types of relative dating
ANSWER
1/3