In context of the information they present, phylogenies are
What will be an ideal response?
both evolutionary trees, depicting species' relationships, and visual proposals based on examination of traits.
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Bioluminescence is controlled by the gene regulatory mechanism called quorum sensing, wherein the
A) depletion of oxygen is detected by an inducer molecule which activates transcription of the lux operon. B) accumulation of an inducer molecule activates transcription of the lux operon. C) absence of light activates an inducer molecule which activates transcription of the lux operon. D) host tissues produce an autoinducer molecule which activates transcription of the lux operon.
If a gene has two alleles, and allele A has a frequency of 83%, then allele a has a frequency of ____
Fill in the blank with the appropriate word.
Primary meristems are located in the ________ of the plant?
A. dermal tissue B. vascular tissue C. woody stem D. root and stem tips E. stem tip only
Mendel's dihybrid crosses, but not his
monohybrid crosses, show that a. some genes are linked together. b. the two alleles controlling a trait are divided equally among the gametes. c. alleles for different traits are inherited independently. d. one of the pair of alleles is dominant to the other. e. the crossing of two different homozygous forms will not produce any offspring in the first generation that will look like either of the parents.