2019-2020-unit 4 exam: cellular energy
1. a scientist set up 2 identical respiration chambers. in respiration chamber #1, the scientist put a mouse. in
respiration chamber #2, the scientist put a cricket. at the end of one hour, the scientist measured the amount
of co, given off by the cricket and the mouse. a small amount of co, had been given off by the mouse, but
very little co, had been given off by the cricket. which claim below best explains why both the cricket and
mouse are carrying out cellular respiration?
a. both the cricket and the mouse are organisms that contain mitochondria to conduct cellular respiration.
b. both the cricket and the mouse are organisms that do not contain mitochondria to conduct cellular
respiration
c. both the cricket and the mouse are organisms that contain chloroplasts to conduct cellular respiration.
d. both the cricket and the mouse are organisms that contain a nucleus to conduct cellular respiration

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa. which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.