Which cannot be a symbiosis?
a. mutalism c. commensalism
b. parasitism d. interspecific competition
D
Biology & Microbiology
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Referring to the ionic bond formation between sodium and chlorine, which of the following is not a true statement?
A. Na is the chemical symbol for sodium.
B. Sodium donates an electron.
C. Chlorine donates an electron.
D. Sodium becomes positively charged.
E. The bond that is formed is stronger than a hydrogen bond.
Biology & Microbiology
Chromosomes are duplicated during __________ of the cell cycle
a. G1 phase b. G2 phase c. S phase d. metaphase e. prophase
Biology & Microbiology
The early Earth's reducing atmosphere probably contained all of the following except
A. water. B. hydrogen sulfide. C. carbon dioxide. D. oxygen. E. methane.
Biology & Microbiology
Which of the following is noncellular?
A) fungi B) viruses C) protozoa D) algae
Biology & Microbiology