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Ninth Grade (Grade 9) Biology Questions

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Grade 9 Biotic and Abiotic
Which of the following situations show a biotic factor operating within an ecosystem?
  1. the kind of climate in a given region
  2. carnivores that eat other animals
  3. the concentration of hydrogen gas in the air
  4. the rate of water flow in a body of water
Grade 9 Evolution
According to Darwin, evolution occurs                                 .
  1. quickly
  2. because of natural selection
  3. regularly at every 5,000 years
  4. when the organism desires change
Grade 9 Cell Structure and Function
Mitochondria are found in                              .
  1. animal cells only
  2. plant cells only
  3. neither animal or plant cells
  4. both animal and plant cells
Grade 9 Skin, Skeleton, and Muscles
The three primary types of muscle fiber present in the human body are                                 .
  1. smooth, cardiac, and digestive
  2. cardiac, respiratory, and smooth
  3. skeletal, smooth, and cardiac
  4. skeletal, cardiac, and digestive
Grade 9 Biotic and Abiotic
Grade 9 Food Chains and Webs
Each step in a food chain or food web is represented by a(n)                    .
  1. biomass pyramid.
  2. ecological pyramid.
  3. energy pyramid.
  4. trophic level.
Grade 9 DNA, RNA, and Genetics
Which four nitrogenous bases are found in DNA?
  1. guanine, cytosine, adenine, thymine
  2. guanine, uracil, adenine, cytosine
  3. both a and b
  4. none of the above
Grade 9 Anatomical Organization
Grade 9 Macromolecules
Grade 9 Adaptations and Behavior
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Human Reproduction
Grade 9 Biogeochemical Cycles
Grade 9 Biotic and Abiotic
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