Bio module 2 topic 1: The History of Life

Question 1

trace fossils

Answer 1

geological records of the activities and behaviors of past life. a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself

Question 2

replacement fossils

Answer 2

when the original shell or bone dissolves away and is replaced by a different mineral

Question 3

superposition

Answer 3

the ability of a quantum system to be in multiple states at the same time until it is measured.

Question 4

paleontologist

Answer 4

a scientist who studies the history of life on Earth through the fossil record.

Question 5

autotrophic

Answer 5

making its own food supply using inorganic materials and photosynthesis or chemosynthesis.

Question 6

protist

Answer 6

an organism whose cells contain a nucleus

Question 7

archaea or archaebacteria

Answer 7

Single cell organisms that do not have a nucleus.

Question 8

endosymbiant theory

Answer 8

The theory that mitochondria and chloroplasts in cells of animals and plants developed from bacteria that uses oxygen that was swallowed by bacteria that does not use oxygen.

Question 9

biogenesis

Answer 9

the process whereby a living thing comes from another living thing

Question 10

spontaneous generation

Answer 10

the supposed production of living organisms from nonliving matter

Question 11

Mesozoic Era

Answer 11

means ‘middle life’ and this is the time of the dinosaurs.

Question 12

Cenozoic Era

Answer 12

beginning about 66 million years ago and extending to the present.

Question 13

Precambrian Era

Answer 13

the earliest of the geologic ages, which are marked by different layers of sedimentary rock.

Question 14

Paleozoic Era

Answer 14

began 541 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago