12. All of the following undergo biogeochemical cycles except 13. Living organis
ID: 274072 • Letter: 1
Question
12. All of the following undergo biogeochemical cycles except 13. Living organisms depend on the results of nitrogen fixation to synthesize all of following except 14. Which of the following biogeochemical cycles contain a mineral component? 15. Autotrophs are found in the kingdoms of a) carborn b) energy c) nitrogen d) sulfur a) proteins b) amino acids c) nucleic acids d) sugars a) phosphorus b) carbon c) nitrogen d) oxygen a) Monera b) protista c) planta d) all of these 16. The primary consumers are a) autotrophs b) carnivores c) decomposers d) herbivores 17. Primary succession can occur on all of the following except a/an a) bare surface b) rock c) open water d) fire ravaged soil 18. Which of the following is not one of the characteristics of a biome? a) they are terrestrial communities c) they occur over wide areas b) they are oceanic habitats d) they have characteristic climates 19. Theis a type of grassland. b) tiga c) tundra d) temperate forest a) savannaExplanation / Answer
12 b...The main chemical elements that are cycled are: carbon (C), hydrogen (H), nitrogen (N), oxygen (O), phosphorous (P) and sulfur (S).
13 d.. except sugars, all are nitrogenous substances.
14 a . Phosphorous Cycle : phosphorous moves in a cycle in our atmosphere via rocks, sediment, soil, water and living organisms. Over a long period of time weathering of rocks leads to phosphate ions and minerals being released into the soil and water. This is absorbed by living organisms who need phosphorous to build nucleic acids such as DNA. Then when these living organisms die, phosphates are released back into the soil.
15 d. Monera and protista areAutotrophs or Heterotrophs and plants are Autotrophs.
16. d Primary consumers are herbivores, feeding on plants. Secondary consumers, on the other hand, are carnivores, and prey on other animals. Omnivores, who feed on both plants and animals, can also be considered a secondary consumer.
17. d Primary succession occurs in essentially lifeless areas—regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes,or rocks left from a retreating glacier.
18 c Climate is the most important abiotic factor affecting the distribution of terrestrial biomes. Climate includes temperature and precipitation, and it determinesgrowing season and soil quality. It is the major factor affecting the number and diversity of plants in terrestrial biomes.
19 b The three major types of grasslands are tropical or savannas, temperate grasslands, and polar grassland/tundra
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