For coral reefs to form in tropical waters, it is necessary for the coral animals to live in symbiosis with:a
bacteria.
b. parrot fish.
c. zooxanthellae.
d. sea urchins.
e. kelp.
c
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Patients infected with Mycobacterium tuberculosis in environments where drug resistance is expected or has already been identified usually have to take antibacterial drugs for six months to ensure the infectious agent is completely killed
Indicate whether the statement is true or false.
Which of the following statements is true regarding fungi? Select all correct choices
A. Many fungi demonstrate both asexual and sexual cycles. B. Fungi are heterotrophs. C. Fungi are autotrophs. D. Fungi only reproduce asexually (e.g., via budding). E. Fungi serve as decomposers.
If a single-celled freshwater organism such as a protistan is transferred to saltwater, which of the following is likely to
happen?
a. The cell will burst. b. The cell will shrink. c. Salt will be pumped out of the cell. d. Salt will be pumped into the cell. e. Enzymes will flow out of the cell.
Which of the following situations would be considered an example of positive regulation of gene expression in a prokaryote?
A. The CAP protein activating the lac operon when lactose is absent and glucose is present. B. The CAP protein activating the lac operon when glucose is absent and lactose is present. C. The repressor protein activating the lac operon when lactose is absent and glucose is present. D. The repressor protein activating the lac operon when glucose is absent and lactose is present.