A Invasive species can out compete native species when they are introduced outside of their
natural environment. This can threaten a region's
ecosystems, economy, and society. Recently, Canadian
researchers helped identify 15 new bird species
through genetic analysis. Scientists were able to
identify so many new species by analyzing and
comparing the DNA of over 600 North American bird
species. Explain how you think the use of genetic
analysis could help prevent the introduction of new
inyasiye species into Canada.

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

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?