In your lab, you notice that pea plants that were given a mixture of water and fertilizer have grown nearly three times as tall as pea plants that were given water only. This step of the scientific method is called:
A) stating a law.
B) making an observation.
C) drawing a conclusion.
D) conducting a critical experiment.
E) formulating a theory
B) making an observation.
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Gastropods are the most numerous group of mollusks and include the ________.
A. snails and slugs B. clams and oysters C. scallops and nautiluses D. squid and octopi
You have cloned a eukaryotic gene, and inserted it into a bacterial system for expression. You discover that the gene product is much longer than should be observed based upon the insert you successfully cloned
What problems would result in a longer cloned sequence? How will you go about investigating your hypothesis? Would your answer change based upon the presence or absence of introns? Why or why not? What will be an ideal response?
What major evolutionary innovation makes ferns different from their ancestors?
a. embryos encased in seeds b. the production of pollen c. flowers d. the alternation between haploid and diploid generations e. vascular tissue
Biofilm infections are harder to treat than the same free-living organisms because
A. When part of a biofilm community, the bacterial cells express different genes thus changing their antibiotic susceptibility B. Bacteria in a biofilm exist only on synthetic surfaces such as catheters, so they cannot be treated with antibiotics C. The organisms in the biofilm degrade the antibiotics at a much faster rate than their free living counterparts D. Organisms in a biofilm develop antibiotic resistance more rapidly than free living cells