Which of the following is most toxic?
a. alcohol dehydrogenase
b. ethanol
c. acetaldehyde
d. acetate
e. carbon dioxide
C
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Why do florists and horticulturists often cut stems while they're holding a plant underwater?
A) to avoid transpiration B) to prevent dormancy C) to disrupt apical dominance D) to avoid formation of an embolism
Through chemical digestion, nucleic acids are broken down into
A) fatty acids. B) monosaccharides. C) nucleotides. D) amino acids.
Which of the following is NOT usually considered a mutation?
a) DNA methylation taking place on a CpG site that formerly was un-methylated b) Translocation whereby a region of chromosome 8 is swapped with chromosome 14 c) Shortening of a micro satellite repeat in the exon of a gene during mitosis d) A change in the base sequences of DNA
Stamens and carpels are, in fact, modified sporangia-bearing leaves.
Answer the following statement true (T) or false (F)