Which of the following statements about an organ is false?
A) An organ represents a higher level of structure than the tissues composing it.
B) An organ consists of several tissues.
C) An organ can only carry out the functions of its component tissues.
D) An organ consists of many cells.
Answer: C
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A gram-negative, nonsporulating rod that is highly motile, oxidase negative, facultatively aerobic, ferments glucose, and urease-positive is likely to be of which genus?
A) Pseudomonas B) Proteus C) Lactobacillus D) Rickettsia
Amoeboid protozoans are autotrophic
Indicate whether the statement is true or false
During the process of splitting water during photosynthesis, the first cyanobacteria released _____ into the
atmosphere. a. oxygen gas b. infrared heat c. hydrogen gas d. carbon dioxide
e. photons of lightWhich of the following best describes aquaporins?
a. They are channel proteins for water. b. They are carrier proteins for water. c. They are channel proteins for solutes. d. They are carrier proteins for water and solutes.