Scientists devised experiments to shed light on whether different fish species of the same genus compete in their natural habitat. They constructed 12 ponds, identical in chemical composition and physical characteristics. Then they released the following individuals into each pond: Ponds 1,2,3 Species A 300 per pond Ponds 4,5,6 Species B 300 per pond Ponds 7,8,9 Species C 300 per pond Ponds 10,11,12 Species A,B,C 300 of each per pond Does this experimental design take into
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Scientists devised experiments to shed light on whether different fish species of the same genus compete in their natural habitat. They constructed 12.
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Scientists devised experiments to shed light on whether different fish species of the same genus compete in their natural habitat. They constructed 12 ponds, identical in chemical composition and physical characteristics. Then they released the following individuals into each pond:
Ponds 1,2,3Species A 300 per pondPonds 4,5,6Species B 300 per pondPonds 7,8,9Species C 300 per pondPonds 10,11,12 Species A,B,C 300 of each
per pond
Does this experimental design take into consideration all factors that can affect the outcome? If not, how would you modify it?
Chemistry of Life
Elements of LifeCarbonHydrogenOxygenNitrogen
} 96% of life
Atom Structure Review
Atomic Number = Number of protons
Mass Number = Number of protons + Number of neutrons
Isotopes – Variant forms of elementsIsotopes occur because of variations in
neutron number (proton number is always the same)
RadioisotopesSpontaneous decay of nucleusEmits energy Used as radioactive tags