list one key similarity and one key difference between a vaccine and the pathogen it protects against

Individuals do not compete directly for resources, but are prey for the same predator

Wich of the following are manual restraint techniques for dogs

The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?