Paralytic shellfish poisoning occurs when ________ are eaten by humans or marine mammals
A) euglenids
B) diplomonads
C) diatoms
D) excavates
E) dinoflagellates
E
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Describe the five levels of ecological organization in the context of the biosphere and biomes
What will be an ideal response?
Which of the following statements concerning cancer
cells is most accurate? a. Proto-oncogenes are part of the regulatory section of a chromosome. b. Tumor cells have lost their ability to stop dividing. c. Proto-oncogenes help control runaway cell division. d. Benign tumor cells usually spread only to adjacent organs. e. Metastasis is the spread of benign cells.
The largest hole in the ozone layer occurs in the stratospheric layer over
A) the Amazon rainforests.
B) the eastern coast of the United States.
C) the western coast of the United States.
D) Africa and South America.
E) Antarctica.
What development allowed preimplantation genetic testing to be possible?
a. Polymerase Chain Reaction. b. Use of minimally invasive screening techniques. c. The ability to detect Huntington’s disease. d. Artificial insemination.