The tissue that produces cells to thicken a root or stem is/are the
A. apical meristem only.
B. apical and lateral meristems.
C. tracheid.
D. vascular bundle.
E. lateral meristem only.
Ans: E. lateral meristem only.
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A protein containing a signal located at its amino terminal end could be sorted to:
A. the cytosol. B. the nucleus. C. a mitochondrion or the rough endoplasmic reticulum.
How would the phenotypes of progeny differ if a trait was produced from the influence of many genes, compared to a trait caused by a single gene with two alleles and incomplete dominance?
A. They would not differ, and progeny in both would have an array of phenotypes that vary continuously across a range. B. The progeny from the single-gene cross would all be identical, whereas the manygene cross would vary continuously across a spectrum. C. The progeny from the single-gene cross would have three phenotypes, whereas the progeny of the trait caused by many genes would vary continuously across a spectrum.
The substance most rich in unsaturated fats is
A. fat that is solid at room temperature. B. butter. C. beef fat. D. bacon grease. E. olive oil.
The observation by scientists that flies preferentially mate with those of similar phenotypes illustrates
random mating. Indicate whether the statement is true or false.