In his work with pneumonia-causing bacteria and mice, Griffith found that __________.
A. heat-killed pathogenic cells caused pneumonia
B. the protein coat from pathogenic cells was able to transform nonpathogenic cells
C. the polysaccharide coat of bacteria caused pneumonia
D. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic
Ans: D. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic
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A DNA microarray is ____
a. used for gel electrophoresis b. used identifying fragments of genes using a labeled probe c. linked to self-replicating vectors to create recombinant DNA molecules d. a series of long mRNA sequences placed on a solid support and has several uses e. a series of short nucleotide sequences placed on a solid support and has several uses
At rest, a nerve cell has a high concentration of
__________ inside and a high concentration of __________ outside. a. acetylcholine; chlorine b. sodium; potassium c. potassium; sodium d. calcium; phosphorous e. phosphorus; calcium
Ecological models can be mathematical or they can be verbally descriptive
Indicate whether the statement is true or false
Which of the following spores are sexually produced?
A. zygospores B. sporangiospores C. blastospores D. arthrospores E. chlamydospores