Answer: iodine
<span><span>A deficiency of iodine will cause the thyroid gland to enlarge and the person to become sluggish. Noncancerous enlargement of the thyroid gland due to deficiency In iodine in the diet is known as goiter. Iodized salt provides plenty of iodine.</span></span>
Investigate-make observation and reseach your topic of interest.Ex: library, internet, textbooks, ask someone.
Plant cells have a cell wall, animal cells don't.
Plant cells have a large central vacuole and animal cells have more numerous, smaller vacuoles.
Plant cells have chloroplasts and animal cells do not.
Hope this helps ;)
Blood? I know that if a blood vessel pops in your brain, you will most likely die. Dont get upset if it's the wrong answer. I've just heard it before.
