The marine protists with pore-studded shells called tests belong to which group?
A. sarcodina
B. rhodophyta
C. foraminifera
D. chlorophyta
Answer: C
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What would be the ultimate effect on an ecosystem if decomposers were eliminated?
a. The consumers would have to eat twice as much. b. The rate of photosynthesis would increase. c. All life would eventually cease as nutrients would no longer be available. d. Energy flow between producers and consumers would increase. e. Producers would outgrow consumers due to the excess of carbon dioxide.
Some athletes use "blood doping," adding additional red blood cells to the blood, to achieve a competitive edge. What will the extra red blood cells do in the body?
A) make the heart beat faster B) increase O2 delivery to muscles C) decrease blood pressure D) change the blood type
Photosynthetic, nonmotile organisms having cell walls belong to the Kingdom
A. Plantae. B. Fungi. C. Protista. D. Animalia.
Prokaryotic cells are represented by fossils that are dated back as far as _____ billion years ago.
A. 1.5 B. 2.8 C. 3.8 D. 4.8