List four human activities that are a threat to biodiversity

What are the student's observations and inferences before he starts his investigation?

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing

Which type of neuron stimulates muscles to contract?