Andrew is studying bone development and calcium absorption in elephants. Which vitamin is
likely an important component of his study?
a. vitamin D
b. vitamin A
c. vitamin K
d. vitamin B
A
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Which of the following are primarily structures
for the packaging of cellular secretions for export from the cell?
a. Golgi bodies b. mitochondria c. lysosomes d. ribosomes e. endoplasmic reticulum
Refer to Figure 5-1. Which of the following statements about the red blood cells in Figure B is true?
a. These red blood cells have been placed in an isotonic solution.
b. These red blood cells have swollen in response to a hypertonic external solution.
c. These red blood cells have swollen in response to a hypotonic external solution.
d. These red blood cells have shrunken in response to a hypertonic external solution.
e. These red blood cells have shrunken in response to a hypotonic external solution
The Ti plasmid is crucial to genetic engineering in plants. The key feature of the Ti plasmid is that it
A) uses the CRISPR/Cas system to edit the plant genome. B) only replicates in bacterial cells. C) uses zinc finger nucleases (TALENs) to edit the plant genome. D) leads to insertion of a part of the plasmid DNA into the plant cell chromosomal DNA. E) acts as an artificial chromosome within plant cells.
All of the following are characteristics of viruses exceptÂ
A. ultramicroscopic size. B. definite shape. C. ability to infect host cells. D. metabolism. E. genes.