How was mendeleev able to predict the existence of unknown elements

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

Fruit bats in central america eat bananas and other fruits. banana plants rely on bats for pollination. what would be the most likely consequence on the banana crop if fruit bats were eliminated from the area? the banana crop would increase because bats would stop eating the crops. the banana crop would decrease because bats would no longer pollinate the crops. the banana crop would remain constant because bees would replace the bats. the banana crop would remain constant because the plants would adapt using asexual reproduction.