It's being estimated that dinosaurs lived on Earth from about 237 million years ago to about 66 million years ago. So answers B and D are definately too "old", while answer A is too "young". I'd pick answer C as it's most probable.
Answer:
B. Aerobic bottom water
D. High organic productivity in the overlying oxygen rich water
Explanation:
A Shale is a sedimentary rock usually formed from silt and clay-size mineral. There are different colors of Shale. The Black Shale is formed under anaerobic conditions. This means that oxygen is deficient in the water where the Shale forms.
A little amount of organic materials is required for the formation of Black Shale and because Black Shale is formed in an environment lacking oxygen, an oxygen-rich water would not be necessary for its growth. Sediments are necessary in the formation of Black Shale.
Answer:
Fish, shrimp prawns, crabs, shellfish and snails.
Others can be tigers, sharks, turtles, and many more.
Answer:
An extremely important byproduct of photosynthesis is oxygen, on which most organisms depend.
Explanation:
Photosynthesis occurs in green plants, seaweeds, algae, and certain bacteria. These organisms are veritable sugar factories, producing millions of new glucose molecules per second.
<span>Deserts landscapes are jagged and rocky due to high erosion rates and chemical weathering. The chemcial weathering changes the physical character of the rocks which is the cause of it being jagged and rocky.
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-Hope this helps.
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