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The answer is A. utilize ducts to release their secretions.
Exocrine glands are glands that secrete their products into ducts, they are the counterpart of endocrine glands which release their products into the bloodstream. Typical exocrine glands include: mammary glands, sweat glands, salivary glands, and many glands of the digestive system.
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The answer would be:
6,250 joules
Here's how to do it:

KE = kinetic energy (joules)
m = mass (kg)
v = velocity (m/s)
So with that formula let's figure out what was given to you.
500 kg and 5m/s
You know which is which based on the unit.
m = 500kg
v = 5m/s
Now all you need to do is plug it into your formula and solve.





The unit
also means joules
So the final answer is 6,250 joules.
Well for it to be valid you are going to need a hypothesis,control,and variables. The control should be the plant food since it stays constant. And the variables should be the 2 different plants.