Which of the following statements is true?
electrons have a negative charge.
the n=1 shell can hold eight electrons.
the number of electrons in an atom is equal to the number of neutrons.
the second electron shell can hold 16 electrons.

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Everything that surrounds a particular organism