When a species dies, the species is said to be:
a. extinct.
b. extant.
c. endangered.
d. threatened.
e. endemic
A
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The pathway leading to the perception of sound by mammals begins with the _____
A) hair cells of the organ of Corti, which rests on the basilar membrane, coming in contact with the tectorial membrane B) hair cells of the organ of Corti, which rests on the tympanic membrane, coming in contact with the tectorial membrane C) hair cells of the organ of Corti, which rests on the tectorial membrane, coming in contact with the basilar membrane D) hair cells of the organ of Corti coming in contact with the tectorial membrane as a result of fluid waves in the cochlea causing vibrations in the round window E) hair cells on the tympanic membrane that stimulate the tectorial membrane neurons, leading to the auditory section of the brain
An infectious disease is an infection that impairs the normal state of health
Indicate whether this statement is true or false.
In which of the following ways is proteobacterial photosynthesis different from plant photosynthesis?
a. Proteobacterial photosynthesis uses a different molecule than chlorophyll. b. Proteobacterial photosynthesis does not produce oxygen. c. Proteobacterial photosynthesis uses water as an electron donor. d. Proteobacterial photosynthesis uses a different molecule than chlorophyll and does not produce oxygen e. Proteobacterial photosynthesis occurs in the dark.
What is the single most important factor that makes worldwide sustainable development difficult?
What will be an ideal response?