The majority of the human population is __________ for this trait
a. homozygous recessive
b. homozygous dominant
c. heterozygous
d. codominant
A
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A bacterium that you isolated from pond water appears to use light for energy. Based upon this information, you inoculate the organism into fresh media, infused with lots of carbon dioxide. Even after incubation at the correct temperature (of pond water), the organism is not growing. Your best explanation of what might have happened is
A. there was no sulfur compound added to the medium, that could be used as an electron donor. B. there is some inhibitory chemical that is preventing the growth of the bacterium. C. you were using the wrong type of sunlight as the energy source for the bacterium. D. no oxygen was added to the medium so the organism died.
Prosimians look like gorillas.
Answer the following statement true (T) or false (F)
The osmoregulatory/excretory system of a freshwater flatworm is based on the operation of _____
A) protonephridia B) metanephridia C) Malpighian tubules D) nephrons
The characteristic feature that applies to all microorganisms is
a. they are multicellular b. they perform photosynthesis c. their cells have distinct nuclei d. they are visible only with a microscope