Which system is responsible for the transportation of oxygen throughout the system

1. respiratory system

2. endocrine system

3. digestive system

4. circlulatory systems

if a man with blood type A one whose parents have blood type O marries a woman with blood type O what percentage of the offspring will have blood type OO

On a remote island in the Pacific, geographical isolation ensured that the human population had auburn colored hair for several generations before intermingling led to a change in hair color. What pattern and kind of evolution is this an example of?

Irrigation can bring in water to crops thy wouldn't normally get it from the rain reliably enough but a potential side effect of irrigation is

is it bad that a kid secretly put a drug in my drink and i drunk it what do i do? am i a drug man now?

What is coevolution?

How do tectonic plates move at transform plate boundaries? slide horizontally past each other move apart from each other compress each other by moving toward each other

A confounding variable is another variable, other than the independent variable, that may have an effect upon your experiment's results.

Which of the following codes for a specific protein? Question 1 options: DNA gene enzyme chromosome

Any problem of inquiry can be proved or disproved using the scientific method. True False

What was the first living cells to evolve on earth?