In succession, the ability of one species to make the area suitable for another species is called
A. secondary succession.
B. climax succession.
C. inhibition.
D. facilitation.
E. primary succession.
D. facilitation.
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A scientist studying a material has determined that 12C, 13C, and 14C occur in the material in a ratio of 1000:10:1. How did he most likely differentiate between these forms of carbon?
A. by the number of protons in 12C, 13C, and 14C B. by the number of electrons in 12C, 13C, and 14C C. by the number of neutrons in 12C, 13C, and 14C D. by the biomasses of 12C, 13C, and 14C E. by the number of positrons in 12C, 13C, and 14C
What is an organism's advantage to having a single reproductive event in a lifetime rather than being able to reproduce repeatedly? a. Reach a higher level of reproductive maturity
b. Having to raise only one group of offspring. c. Being able to invest all its energy into the production of offspring. d. Being able to divide energy among growth, reproduction and maintenance.
The 12.011 in the diagram for Carbon specifies:
a. The number of protons in Carbon b. The number of neutrons in Carbon c. The number of electrons in Carbon d. The atomic number of Carbon e. The atomic mass of Carbon
Which of the following statements about proteins is FALSE?
A) They are composed of amino acids. B) They have multiple levels of structural organization. C) They can be hydrophobic, hydrophilic, or both. D) Their primary function is energy storage. E) They are formed by dehydration synthesis reactions.