fossils - exam 3

Question 1

direct or altered remains of an organism

Answer 1

body fossils

Question 2

evidence of the activity of an organism

Answer 2

trace fossils (ichnofossils)

Question 3

organic compound with a chemical structure that can be related to a particular organism

Answer 3

biomarkers

Question 4

unaltered remains, permineralization, recrystallization, dissolution and replacement (cast and internal mold), and carbonization are all

Answer 4

types of fossilization processes

Question 5

to be considered a fossil, the remains/traces have to be

Answer 5

generally over 10,000 years old

Question 6

to become a fossil, a specimen

Answer 6

must possess hard parts

Question 7

diatoms are

Answer 7

one celled plants

Question 8

diatoms are composed of

Answer 8

silica (quartz)

Question 9

protozoans are

Answer 9

one celled animals

Question 10

we classify fossils the same way we classify

Answer 10

living organisms

Question 11

we use the _____ ______ to classify fossils

Answer 11

linnean system

Question 12

phylum cnidaria are

Answer 12

hollow bodied animals such as coral and jellyfish

Question 13

phylum mollusca is

Answer 13

soft bodied animals like snails and bivalves

Question 14

octopus and squid are in the class

Answer 14

cephalopod

Question 15

phylum arthropada are

Answer 15

jointed foot animals

Question 16

the most abundant animal group in phylum arthropoda are

Answer 16

insects

Question 17

phylum echinodermata is

Answer 17

spiny skinned animals

Question 18

sand dollars, blastoids, and crinoids are

Answer 18

fossil echinoderms

Question 19

phylum chordata is

Answer 19

the humans scientific phylum and has a dorsal/back spinal cord

Question 20

class osteichthyes are

Answer 20

bony fish

Question 21

the age of amphibians was in

Answer 21

the carboniferous period as they were most prominent with no competition

Question 22

why is plant fossilization less common?

Answer 22

plants live on land and don’t have hard parts

Question 23

what environment are plants more likely to fossilize

Answer 23

wet environments/conditions

Question 24

class reptile includes

Answer 24

hard shelled eggs, dinosaur fossils, turtles, snakes, lizards, alligators

Question 25

the age of reptiles was in

Answer 25

the mesozoic era