Answer the following statements true (T) or false (F)
1. Sweat has a higher salt concentration than the blood does in humans.
2. Animals that do not control internal water concentration also typically do not control the concentrations of ions like sodium and potassium.
3. An animal that exhibits broad tolerance for changes in the salinity of its environment is said to be "euryhaline."
4. The materials in urine are ONLY those that are filtered from the blood or hemolymph and not reabsorbed by the body following filtration.
1. FALSE
2. FALSE
3. TRUE
4. FALSE
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Probes used for detecting genetic sequences are frequently composed of
A) agarose. B) synthetic nucleic acids and labeled conjugates, such as fluorescent dyes. C) restriction enzymes. D) silicon chips. E) nitrocellulose.
Why are mitochondria and chloroplasts believed to have entered early eukaryotic cells by endosymbiosis of bacteria?
A. They contain DNA. B. They are the same size as bacteria. C. They are not derived from the endomembrane system as other organelles are. D. All of the choices are correct.
Recombinant DNA technology is dependent on a particular class of enzymes, known as ________ that cuts DNA at specific nucleotide sequences
A) recombinant DNA technology B) genomes C) restriction enzymes D) vectors E) clones
Researchers have successfully isolated the majority of microbes from their natural habitats and have cultured them in vitro on artificial media to facilitate extensive study.
Answer the following statement true (T) or false (F)