The botulinum toxin (or Botox) is one of the most lethal toxin to humans with a killing dose of 1 ng/kg of bodyweight. In order to have a better understanding of the potential molecular mechanism, estimate how many molecules of Botox are necessary to kill a single human cell. You will, as usual, state your rationale and explain your calculations. You can use the internet to get access to useful numbers on the botulinum toxin.

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.