When scuba steph got back to the beach, she sat in the sun. after a little while, she noticed that there was a white, powdery residue on the sleeve of her wetsuit. what is that?
a. dust from the coral reef she must have accidentally hit
b. salt left behind after water evaporated
c. powdered sugar from the donut she had for breakfast

I think it is B. Salt left behind after water evaporated because in water, there is salt. When the sun appears, the water evaporates a little, causing the salt to expose!

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.