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Gilbert Huffman
How do fossils provide evidence to support the theory of the evolution of earth?
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Snoop
Though some bacteria cause disease and illness in humans, the majority are harmless. Some bacteria are used to aid digestion, used in preparation of certain foods, used to battle infections or used by industry. Bacteria have many important roles in nature. All BUT ONE is a role of bacteria out in the world around us.

A) Some bacteria increase the soil fertility.

B) Bacteria carry out 60% of total nitrogen fixation in natural ecosystems.

C) Bacteria are responsible for converting sunlight into usable chemical energy.

D) Bacteria decompose organic matter, by decay and putrefaction, to keep our earth clean.
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Andreas Winters
Carbon is a fundamental element of all living things. Carbon atoms move continiously through living organisms (biosphere), the sea (hydrosphere), the land (geosphere), and the air (atmosphere). This continious movement is known as the carbon cycle. Photosynthesis and respiration are a very important part of carbon cycling. Which diagram correctly depicts the cycling of carbon through photosynthesis and respiration?
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Sydnee
Which of the following does not appear as a separate section on the cash budget?

Entry field with correct answer

Cash receipts

Cash disbursements

Financing

Capital expenditures
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Elisabeth Blackburn
Which of these correctly maps the circulation blood from the heart through the blood vessels and back to the heart?

A. heart → arteries → capillaries → veins → heart

B. heart → veins → capillaries → arteries → heart

C. heart → arteries → capillaries → veins → capillaries → heart

D. heart → capillaries → arteries → veins → capillaries → heart
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Reuben Grant
Which stage of sleep is particularly important for learning and memory processing?
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Whitehead
Early microbial ecologists knew that hydrogen gas is oxidized in soil and that ammonia is oxidized in sewage. How did these scientists determine that microbes are responsible for these ecological reactions? Choose one: A. by removing hydrogen gas and ammonia from soil and sewage samples and observing dead microbes under the microscope. B. by adding pure cultures to sewage samples and detecting the formation of nitrate C. by applying heat and antimicrobial treatment to sewage samples and observing that nitrate was no longer formed D. by preparing pure cultures from soil and sewage samples and observing their metabolic reactions in the laboratory
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Smokey
If more genes for less arm hair are passed on more frequently after several generations will people have more or less arm hair?
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Camilla Wagner
What kind of tissue is the precursor of long bones in the fetal skeleton?
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Ignacio
Why are old rocks rare on the ocean floor
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Genesis
What is a storage form of carbohydrate energy?
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Dallas Craig
How Do Soils Form?

A.

Erosion transports mineral particles, and plants die and decay.

B.

Plants provide organic matter and minerals to make soil.

C.

Weathering breaks rocks into minerals, and plants die and decay.

D.

Plants cement mineral particles together to form soil.
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Maryjane
Darwin noticed that birds that were good at finding scarce food in the winter had a better chance of surviving and producing offspring. What did he call this struggle for existence? artificial selection natural selection differential reproduction differential overproduction
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Bryanna Huffman
The chart below shows the codons that make up the genetic code and the sequence of nucleotides that corresponds to them. A mistake during DNA replication leads to a mutation in the nucleotide sequence shown below. This mutation results from the insertion of two nucleotides into the original sequence, which causes the reading frame of the sequence to change. This kind of mutation is known as
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Oscar Espinoza
The ability of an enzyme to change shape when it binds to its substrate is called
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