In the term trace element, the adjective trace means that
A) the element is required in very small amounts.
B) the element can be used as a label to trace atoms through an organism's metabolism.
C) the element is very rare on Earth.
D) the element enhances health but is not essential for the organism's long-term survival.
Ans: A) the element is required in very small amounts.
You might also like to view...
The incubation period of gonorrhea is approximately
A. 2-5 days. B. 1-2 weeks. C. 14-21 days. D. several months.
Which white blood cell(s) is (are) the only
cell(s) that produces antibodies?
a. B cell b. T cell c. natural killer cell d. dendritic cell e. all of these
The division of cytoplasm is ____________________
When a pregnant woman ingests toxins such as alcohol and nicotine, the embryo is put at risk because these toxins can
A. diffuse from the mother's blood into the embryo's blood within the placenta B. enter the embryo when it eats C. transfer to the embryo since the mother's blood normally mixes with the embryo's blood in the placenta D. enter the uterus through the mother's navel