Consider the phylogeny (Fig. 34.15) below. Which type of data helped the most in constructing this tree?
A. fossils from the group Glomeromycetes
B. morphological characters associated with
fruiting bodies
C. chromosome number of the different
species
D. molecular sequence data
E. presence or absence of a continuous
dikaryotic life stage
D
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In genomic research the term contig refers to overlapping nucleotide sequences that are not adjacent in the genome and are formed from smaller fragments.
Answer the following statement true (T) or false (F)
Alexander Fleming kept finding mold contamination that was killing his bacterial cultures. This observation eventually lead to the development of the antibiotic penicillin. Why would a fungus produce a compound that is selectively toxic to bacteria?
A. Killing bacteria is an accident. B. Fungi are killed by bacterial toxins. C. Fungi compete with bacteria for resources. D. Fungi eat bacteria.
Which of the following ecosystem services is considered indirect and dependent more on maintenance of intact ecosystems and less on availability of particular species?
A) production of food B) production of fiber C) production of medicines D) production of clean air and water E) all of the above
If a drug is designed to denature enzymes involved in digesting phenylalanine, why would patients treated with this drug develop phenylketonuria?
What will be an ideal response?