How does an increased atmospheric CO2 concentration result in increased ocean acidity?
A) CO2 causes less oxygen to occur in oceans.
B) CO2 transforms into H+ ions.
C) CO2 reacts with water to form H2CO3.
D) Increased CO2 causes increases in animal waste which result in more acidic conditions.
C
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Calcitonin is produced by the ____ and is important for the uptake of ____ by bones
a. anterior pituitary; calcium b. posterior pituitary; phosphorus c. thymus; calcium d. thyroid; calcium e. hypothalamus; phosphorus
Which is a byproduct of photosynthesis?
a. water b. light c. glucose d. oxygen e. carbon dioxide
The earliest discovered fossils are of ____ dating back to ____ years ago
a. single celled eukaryotes...4.5 billion b. prokaryotes...3.5 billion c. algae...1.8 billion d. fish...600 million e. dinosoaurs...65 million
Desiccation preserves food through
A) reducing the temperature. B) freezing and drying. C) dehydration. D) pasteurization.