If the element has not become an ion yet, then there is 73 electrons.
Number of protons = number of electrons**
**only when the element has not form an anion or cation.
Answer:
Okay, this one is pretty in-depth, but it's an example none the less.
Explanation:
Take bees, plants, deer, and wolves. All of which are technically species. One is a producer, and three of them are consumers. Bees pollinate plants. The bees now have their food, and the plants are reproducing. The plants are food for the deer. The deer are eating, surviving, and reproducing. The deer are then eaten by the wolves. There ya go. Hope this helps.
They can be used to produce vaccines.
They can be used to determine the response of tissue to drugs.
They can be used to produce hormones.
