Seeds are superior reproductive structures, compared to spores. Describe the advantages of seeds
Briefly describe the connection between human civilization and seeds. What will be an ideal response?
Concepts to Consider: Seeds carry with them nutritive material and are protected by a seed coat;
human civilization advanced with the development of agriculture; seeds are relatively easy to collect
and store in a dry place for planting the following year or for consumption.
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Which of the following is true concerning a somatic cell mutation?
A. A small fraction of the gametes carry the mutation. B. Half of the gametes carry the mutation. C. All of the gametes carry the mutation. D. Only a small group of cells within the organism is affected by the mutation. E. All cells within the organism are affected by the mutation.
The cell walls of plant cells that have stopped
growing and actively dividing are characterized by the presence of a. pectin. b. cellulose. c. glue-like polysaccharides. d. lignin. e. a gluey matrix containing rope-like strands
Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What fraction of the progeny of crosses BbTt × BBtt will be expected to have black fur and long tails?
A) 1/16 B) 3/8 C) 1/2 D) 9/16
Any organism or agent that produces a disease is known as a
A) Pathogen B) Commensal C) Reservoir D) Vector