An area had no previous community and had no existing soil at first, but then living things started occupying the area. This situation would be called ________
A) secondary replacement B) climax community
C) biological magnification D) primary succession
Answer: D
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Which atomic particle has no charge and is located in the nucleus?
A. proton B. electron C. neutron D. ion E. isotope
Which of the following statements is false?
a. Sensory receptors are able to detect specific stimuli only. b. Sensation is an awareness of a change in external or internal conditions. c. A stimulus will generate impulses that are different depending on where the signals are sent in the brain. d. Information about a stimulus is coded in the quantity and frequency of action potentials sent to the brain. e. Specific regions of the brain translate the information about the signal and convert it into a sensation.
The valence of an atom represents its
A) ability to interact with other atoms. B) electronegativity. C) radioactivity. D) ability to attract electrons. E) ability to interact with water.
A unifying principle of biology states that there is a gradual modification of populations of living things over time that sometimes results in new species. This principle is called ________
Fill in the blank(s) with correct word