Nature is __________ in the universe except what
humans have__________.
a. living; destroyed
b. everything; manufactured
c. macromolecular; genetically engineered
d. verifiable life-forms; selectively bred
e. matter; artificially created
Answer: b
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Plants and their predecessors, green algae, do not share the property of
A. containing chlorophylls a and b, and carotenoids. B. containing cellulose-rich cell walls. C. containing a system of roots and stems. D. containing starch as the primary food storage product. E. forming a cell plate during cytokinesis.
What is the leading factor in the establishment of new kelp in an area?
a. Amounts of sunlight b. Type of substrate c. Density of herbivores d. Presence of nutrients
Albinism is an autosomal (not sex-linked) recessive trait. A man and woman are both of normal pigmentation and have one child out of three who is albino (without melanin pigmentation). What are the genotypes of the albino's parents?
A) One parent must be homozygous for the recessive allele; the other parent can be homozygous dominant, homozygous recessive, or heterozygous. B) One parent must be heterozygous; the other parent can be homozygous dominant, homozygous recessive, or heterozygous. C) Both parents must be heterozygous. D) One parent must be homozygous dominant; the other parent must be heterozygous.
The receptor potential is the ________
A) membrane potential produced when a neurotransmitter molecule binds to its receptor B) membrane potential produced in the receptor cell by sensory transduction C) membrane potential produced as an all-or-none phenomenon D) membrane potential produced at a muscle cell