Crop plants have been protected from certain insects by the addition of a gene for a specific insect toxin from the bacterium
A. Agrobacterium tumefaciens.
B. Bacillus thuringiensis.
C. Herpes simplex.
D. Pseudomonas.
E. tobacco mosaic.
B. Bacillus thuringiensis.
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Viruses attach to their hosts via ________.
A. carbohydrate attachments of the viral capsid B. viral flagella C. viral phospholipids D. host phospholipids E. host glycoproteins
Genes for which of the following may be transferred between Fecal Bacteria?
a. Toxin Production b. Fimbriae c. Capsules d. Hemolysins e. All of the Above
Which of the following statements is true?
A) Endospores are for reproduction. B) Endospores allow a cell to survive environmental changes. C) Endospores are easily stained in a Gram stain. D) A cell produces one endospore and keeps growing. E) A cell can produce many endospores.
During the Cambrian explosion approximately 535 to 525 million years ago,
A) all modern species of animals suddenly appeared. B) animals rapidly diversified in the oceans. C) a massive volcanic eruption nearly wiped out life on Earth. D) great forests produced peat layers that were later transformed into coal.