Which of these organisms has an internal structure made of bone and cartilage? A. Organism I
B. Organism Il
C. Organism Ill
D. Organism V

Which of the following examples can cause gene flow between populations? a.an increase in predators to a population of zebra b.a volcanic eruption that kills half of a population of mice c.bird droppings that contain seeds from a different location d.a person that sprays a toxin on a group of mosquitoes

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

When ash and dust begin to settle on the ground, they eventually become compacted by