Levels of ecological organization
What will be an ideal response?
organism/individual
populations
species
guild
community
ecosystem
Biome
Biosphere
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The peptidoglycan of bacterial cell walls contains a carbohydrate matrix linked together by short chains of:
A. fatty acids. B. steroids. C. nucleotides. D. amino acids. E. water molecules.
Long interspersed elements (LINES) are a type of
A. pseudogene. B. proteome. C. exon. D. intron. E. transposon.
In some genetically engineered corn plants, a Bt gene was added to a chromosome. The Bt gene specifies a protein called Bt that is lethal to certain flying insect pests that eat the corn plants. If the corn plant is is heterozygous for the Bt gene (one homolog has the introduced Bt gene and the other does not), what proportion of the sperm would carry the Bt gene? Is the presence of the Bt gene (a mutation) dominant or recessive to its absence (the wild type)?
A) all pollen; dominant B) 1/2; dominant C) 1/3; recessive D) 1/4; dominant E) 1/8; recessive
All of the following are alkylating control agents except ________.
A. formaldehyde B. iodophor C. propylene oxide D. glutaraldehyde E. ethylene oxide