A flower's parts are modified ____ that develop from a receptacle.
A. epidermal cells
B. asexual organs
C. regions of a stem
D. leaves
E. ovaries
Answer: D
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Define Mendel's law of independent assortment.
A. There are two versions of each trait, a dominant and a recessive; the one you get is random. B. The inheritance of one character has no effect on the inheritance of another character. C. Segregation of homologous chromosomes is random. D. The expression of one gene has no effect on the expression of another gene.
Air rushes into the lungs of humans during inhalation because _____
A) the rib muscles and diaphragm contract, increasing the lung volume B) the volume of the alveoli increases as smooth muscles contract C) gas flows from a region of lower pressure to a region of higher pressure D) pulmonary muscles contract and pull on the outer surface of the lungs E) a positive respiratory pressure is created when the diaphragm relaxes
Dissimilatory nitrate reduction results in the production of gaseous products, while assimilatory nitrate reduction results in the production of ammonia for biosynthesis
Indicate whether the statement is true or false.
The first step of the scientific method is to
(a) ask a question. (b) construct a hypothesis. (c) observe carefully. (d) formulate a prediction.