Carbohydrates are an excellent source of energy for the body. If a candy bar and a pear contain an equal number of calories from carbohydrates, which is a healthier food and why?
A) The candy bar is healthier because it contains processed sugars, which provide a faster energy source.
B) The pear is healthier because it contains fewer chemical bonds to be broken during digestion.
C) The pear is healthier because it contains more vitamins, minerals, and fiber.
D) The candy bar is healthier because it contains preservatives that the pear lacks.
C
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The primary reason why certain trees tend to grow straight and tall with few lateral branches when compared with other trees is because:
A. of unknown reasons B. Lateral buds are missing in many of these trees C. Lateral bud development is dependent on temperature D. Gibberellins affect the buds detrimentally E. Auxins inhibit lateral bud development
Which of the following methods of genetic recombination is common to both eukaryotic and bacterial cells?
A. Crossing over B. Vertical gene transfer C. Gamete fusion D. All of the choices are correct.
Toxic shock syndrome toxins are superantigens
Indicate whether this statement is TRUE or FALSE.
Steroid hormones can trigger gene expression in a select number of cells because ____
a. only target cells allow the steroid hormone to cross the plasma membrane b. nontarget cells have a steroid hormone response element encoded in their DNA c. only target cells have the correct receptor in their cytosol to bind to the hormone d. nontarget cells lack the genes found in target cells e. only target cells have the genes that steroid hormones activate