Leaves on the lower part of a bush primarily feed the ____
a. roots
b. leaf tips
c. stems
d. upper leaves
e. flowers
ANSWER: a
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Barnacles are sessile filter feeders but unlike bivalves they have internal fertilization. How do they solve this problem?
A. The filter sperm from the water column. B. They get fertilized during free living larval stages. C. They are only capable of asexual reproduction. D. They are hemaphrodites with especially long penises.
Mendel inferred the genetic basis of ____, such as flower color in peas, by crossing plants with different phenotypes
a. adaptive traits b. allele shuffling c. allelic recombination d. quantitative traits e. qualitative traits
Grafting is used to grow all varieties of edible apples. What does grafting involve?
a. repairing a damaged stem of a plant to continue its growth b. inducing polyploidy in plants c. growing new roots and shoots from extensions of a parent plant d. inducing a cutting from one plant to fuse with the tissues of another plant e. artificially inducing individual cells to divide and form an embryo
Which of the following is a function of plasma membranes?
A) communicating directly with the cell nucleus B) organizing cellular processes C) regulating transportation of materials in and out of a cell D) producing proteins and hormones