How is the half-life of a radioactive isotope determined? A. By measuring the time it takes for half the parent nuclei in a
sample to become daughter nuclei
B. By measuring the time it takes for half the daughter nuclei in a
sample to become parent nuclei
C. By measuring the time it takes for all the daughter nuclei in a
sample to become parent nuclei
D. By measuring the time it takes for all the parent nuclei in a sample
to become daughter nuclei
SUBMIT

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

How are fungi more like an animal? they have a cell wall. they are heterotrophs that absorb their food. they produce seeds and have membrane-bound nucleus. they use sunlight for photosynthesis.