Sexual reproduction
A. allows more offspring to be produced per individual.
B. allows a parent to pass on 100% of their genes to offspring.
C. increases genetic variation.
D. results in the formation of a haploid zygote.
E. only occurs in vertebrates.
C. increases genetic variation.
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Using phages to treat a bacterial infection is an interesting idea because
A. a single type of phage can destroy a wide range of strains of the same pathogen. B. of the increasing problem of antibiotic resistance. C. lysed bacteria pose no threat. D. a single phage can be genetically engineered to infect many different species of bacteria.
Humans have a gene called PDHA1, which codes for one protein that functions as an enzyme in the cell. It helps energy pathways by modifying pyruvate molecules into acetyl CoA molecules. Researchers have identified an insertion mutation in the gene, which produces an extra amino acid within the otherwise normal sequence in the protein. In this type of mutation
A. the mutation is not in DNA, but in the protein. B. the codon that mutates causes a stop codon to occur instead of the placement of an amino acid. C. the codon that mutates causes a change in the amino acid specified. D. the mutation does not occur in an existing codon. E. the mutation may be caused by an addition of three nucleotides.
What is the name given to organisms that can make their own food and thus sustain themselves without consuming organic molecules derived from other organisms?
A) chemotrophs B) heterotrophs C) autotrophs
If you took a plant that was accustomed to bight light and moved it into a dark area, you would expect transpiration to
1) Increase 2) Decrease 3) Stay the same