Biology, 04.02.2021 05:20 davidmfox5890
The half-life of a radioactive element, such as carbon-14, is the time it takes for half of the atoms of the element to decay. How many half-life periods have passed if a fossil contains 1 32 of the original amount of carbon-14?
Answers: 3
Biology, 22.06.2019 04:00
The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons
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Biology, 22.06.2019 05:10
What would happen if the tubing with the yellow band was placed in a beaker of distilled water?
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Biology, 22.06.2019 13:10
Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed
Answers: 2
The half-life of a radioactive element, such as carbon-14, is the time it takes for half of the atom...
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