What makes a mineral element essential for plant growth?
A. It is part of typical chemical fertilizers.
B. It can only be found in organic fertilizers.
C. If it is missing, the plant cannot grow or reproduce normally.
D. As its concentration increases, the plant grows more.
E. It contributes to the solute potential of the plant.
C. If it is missing, the plant cannot grow or reproduce normally.
Essential nutrients are nutrients necessary for normal growth of the plant.
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An organism that does not require oxygen, grows better in the absence of oxygen, but can survive in atmospheres containing some molecular oxygen is known as a/an:
A) aerotolerant anaerobe. B) capnophile. C) facultative anaerobe. D) microaerophile.
Decomposers
a. are able to enter a food chain at any trophic level. b. are the most numerous organisms in an ecosystem. c. include bacteria and fungi. d. can occupy numerous habitats. e. all of these.
Recent successes in gene therapy are attributed to the _____
a. focus on germ-line gene therapy, rather than somatic gene therapy b. development of improved vectors c. sequencing of the human genome d. improvements in prenatal testing techniques e. improvements in gene doping
Which most accurately describes the expression "recombinant DNA"?
a. DNA molecule cloned from a given organism b. DNA molecule that contains genetic information from more than one organism c. DNA molecule that is moved from one tube to another in a laboratory d. DNA molecule isolated from a specific organism e. DNA molecule that has been used in a laboratory for experimental purposes