Which type of chromosomal change occurs when a portion of a chromosome is lost?
a. None of these choices
b. Inversion
c. Translocation
d. Duplication
e. Deletion
e
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Examples of transgenic organisms include:
A. crop plants engineered to resist insect pests. B. rice enriched with vitamin A. C. sheep that produce a human protein in their milk that is used to treat emphysema. D. laboratory mice that develop heart disease and diabetes. E. All of the answer options are correct.
In flowering plants, the ovary might appear above the other flower parts or below them. What is the name for those that have ovaries below the other flower parts?
a. under-ovaries b. hypoflourescence c. inferior d. imperfect
Because embryonic stem cells can form any tissue in the human body, they are termed
_____________; adult stem cells, on the other hand, are termed ______________. Fill in the blank(s) with the appropriate word(s).
Which of the following examples describes a unique functional property of the carboxyl group?
A. Its compounds may be structural isomers with different properties. B. Two groups can interact to help stabilize protein structure. C. It is polar as a result of the electronegative oxygen atom drawing electrons toward itself. D. The covalent bond between oxygen and hydrogen is so polar that hydrogen ions tend to dissociate reversibly. E. It acts as a base.