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Sixth Grade (Grade 6) Biology Questions

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Grade 6 Skin, Skeleton, and Muscles
What is the largest organ in the body?
  1. brain
  2. stomach
  3. heart
  4. skin
Grade 6 Microbiology
Which description is not a characteristic of bacteria?
  1. single-celled organism
  2. cells without a nucleus
  3. cells containing chlorophyll
  4. found almost anywhere on Earth
Grade 6 Biomes
An area with similar climate and life is a(n)                .
  1. ecosystem.
  2. niche.
  3. biome.
  4. abiotic factor.
Grade 6 Nervous and Endocrine Systems
There are miles and miles of neurons in the human brain.
  1. True
  2. False
Grade 6 Cell Structure and Function
Cell walls are part of
  1. plant cells.
  2. animal cells.
  3. organ systems.
  4. plant and animal cells.
Grade 6 Skin, Skeleton, and Muscles
What is the largest bone in the body?
  1. backbone
  2. thigh bone
  3. hip bone
  4. arm bone
Grade 6 Food Chains and Webs
The layers of an energy pyramid are                    .
  1. trophic levels.
  2. energy levels.
  3. energy flow levels.
  4. death by energy.
Grade 6 Circulatory and Immune Systems
What are capillaries?
  1. big, blue blood vessels next to the heart
  2. blood vessels that lead blood away from the heart
  3. blood vessels so small that cells have to go through them single file
Grade 6 DNA, RNA, and Genetics
Which term means a change in a gene or chromosome?
  1. RNA
  2. allele
  3. Punnett square
  4. mutation
Grade 6 Microbiology
Where do fungi live?
  1. on your hands
  2. in warm, damp places
  3. in cold, dry places
Grade 6 Protists and Fungi
Most protists are single celled.
  1. True
  2. False
Grade 6 Cell Structure and Function
What is the nucleus of a cell?
  1. the part of the cell that protects the rest of the cell
  2. the part of the cell that holds all the information
  3. the part of the cell that is like jelly.
Grade 6 Biotic and Abiotic
What are the living parts of an ecosystem?
  1. biotic factors
  2. prey
  3. carnivores
  4. biomes
Grade 6 DNA, RNA, and Genetics
What type of reproduction requires male and female sex cells?
  1. heredity
  2. mitosis
  3. sexual reproduction
  4. asexual reproduction
Grade 6 Cell Structure and Function
The cell structures that break down food to produce energy are the
  1. ribosomes.
  2. mitochondria.
  3. vacuoles.
  4. chloroplasts.
Grade 6 Skin, Skeleton, and Muscles
Which system enables movement of the body?
  1. muscular
  2. circulatory
  3. reproductive
  4. endocrine
Grade 6 Biomes
A place where an animal lives and gets what it needs to survive is a
  1. community.
  2. habitat.
  3. population.
  4. niche.
Grade 6 Development and Reproduction
The form of reproduction in which cells from two parents unite to form a zygote is
  1. asexual reproduction.
  2. primary reproduction.
  3. sexual reproduction.
  4. secondary reproduction.
Grade 6 Respiration, Digestion, and Excretion
In what organ of the digestive system do nutrients separate from waste?
  1. stomach
  2. liver
  3. large intestine
  4. small intestine
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