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Nitrogen Cycler

Nitrogen Cycler. 2013. Nitrogen Cycle. bioh.wikispaces.com. Importance of Nitrogen. Allows plants and animals to make amino acids, proteins and DNA Amino acids: use to make proteins Proteins: made of C, H, N, and other elements, involved in almost all cell functions

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Nitrogen Cycler

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  1. Nitrogen Cycler 2013

  2. Nitrogen Cycle bioh.wikispaces.com

  3. Importance of Nitrogen • Allows plants and animals to make amino acids, proteins and DNA • Amino acids: use to make proteins • Proteins: made of C, H, N, and other elements, involved in almost all cell functions • Forms: antibodies, contractile-movement, enzymes, storage, structural support • DNA: genetic coding to direct the development and functions of cells.

  4. How Nitrogen Moves • Move from atmosphere to Plants • Fire, lightning, and nitrogen-fixing bacteria • Changes it from N2 to the form which plants can use: ammonium ion (NH4+) and nitrate (NO3-) • Bacteria live in the soil and on the roots of plants, which then provides nitrogen to the plants • Plants to Animals • Food Chain: Producers to consumers • Plants and animals to soil • Animal waste • Decay of organisms • Plants and animals to atmosphere • Decay of organisms

  5. Human impact on the Nitrogen Cycle • Humans add to much nitrogen which off balances the cycle • Nitrogen-rich fertilizer and livestock waste • Affect: • Increase nitrate (form of nitrogen) causes plants to grow fast until they use up the supply and die • Increase in plants = increase in consumers and when the plants all die so do the consumers

  6. Nitrogen Cycle Question • Which letters on the cycle shows where nitrogen is being “fixed” into a useable form for plants? • A. A, D • B. B, C • C. C, D • D. A, B

  7. Nitrogen Cycle Question • How do plants get the nitrogen they require for growth? • A. the process of photosynthesis creates nitrogen from sugar • B. by absorbing it from holes in their leaves and combining it with oxygen • C. a symbiotic relationship with bacteria that “fixes” nitrogen in the roots • D. nitrogen from the air attaches itself to the stem and leaves of plants.

  8. Nitrogen Cycle Question • Which of the following best explains why animal manure can be used as a fertilizer for crops and gardens? The plant uses the • A. carbon from the dead plant matter to make sugar • B. nitrogen to make proteins and DNA • C. oxygen for cellular respiration • D. hydrogen to form sugars

  9. Carbon Cycle Question • Which place on the nitrogen cycle shows nitrogen in its LEAST useable form? • A. A • B. B • C. C • D. D

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