A great amount of Antarctic animals feed on them. Whales, penguins, fish, birds, etc. They eat phytoplankton.
Answer: Diseases are caused by a biological agent.
Germ theory of disease, the currently accepted theory of disease, says that many diseases are caused by microorganisms. These microorganisms are biological agents, too small to see without a microscope, they invade humans and animals to be able to grow and reproduce. These "Germs" can be protists, bacteria,fungi, viruses, prions, or viroids.
Answer:
True
Explanation:
Iron oxides can only form naturally in the presence of oxygen as shown the formulae below:
2Fe(II) + O2 → 2FeO
4Fe(III) + 3O2 → 2Fe2O3
The presence of naturally occurring iron oxides can, therefore, be a significant indicator of the presence of oxygen in the atmosphere.
The stress hormones epinephrine and norepinephrine are used by your body to respond to short-term stressors while the stress hormone cortisol provides a more sustained release of energy for prolonged stress.
Epinephrine and norepinephrine are produced by the adrenal medulla during the flight/fight stress response and increase blood pressure, heart rate, and glucose.
<span>The cortisol is steroid hormon with several funstions, one of them is to help the body manage stress</span>
Answer:
follicle stimulating hormone (3)
and
luteinizing hormone (1)
hope this helps!!