Which character separates bacteria from archaea?
A. Bacteria do not have a nuclear envelope.
B. Bacteria are unicellular.
C. Bacteria have peptidoglycan in their cell wall.
D. Bacteria have circular chromosomes.
Answer: C. Bacteria have peptidoglycan in their cell wall.
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Which of the following is a function of the lymphatic system that assists the cardiovascular system?
A) production of all blood cells B) RETURNING EXCESS TISSUE FLUID INTO CIRCULATION C) distribution of nutrients.
Byproduct of photosynthesis The main byproduct of photosynthesis that is essential to most life forms is
a) glucose. b) carbon dioxide. c) chlorophyll. d) oxygen. e) sunlight.
Environmental change causes the heritable variations in individuals that natural selection acts upon
Indicate whether the statement is true or false
Substances given off by yeasts during fermentation are
a) alcohol b) carbon dioxide c) organic acids d) all of these