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Eighth Grade (Grade 8) Biology Questions

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Grade 8 DNA, RNA, and Genetics
On a Punnett square, what do the letters at the top and left sides represent?
  1. The letters at the top represent alleles of the parents. The letters on the left represent alleles of the offspring.
  2. The letters at the top represent alleles of the male offspring. The letters on the left represent alleles of the female offspring.
  3. The letters at the top represent alleles of one parent. The letters on the left represent alleles of the other parent.
  4. The letters at the top represent alleles of the female offspring. The letters on the left represent alleles of the female parent.
Grade 8 Food Chains and Webs
Mushrooms and bacteria are considered
  1. producers.
  2. consumers.
  3. carnivores.
  4. decomposers.
Grade 8 Microbiology
Unicellular organisms contain many cells.
  1. True
  2. False
Grade 8 Circulatory and Immune Systems
The heart contracts on its own about 200,000 times a day.
  1. True
  2. False
Grade 8 DNA, RNA, and Genetics
What model can be used to predict the outcome of a genetic cross?
  1. Punnett square
  2. Mendel square
  3. concept map
  4. allele triangle
Grade 8 Evolution
Important evidence for evolution can be found in
  1. mutations.
  2. nature.
  3. plants.
  4. fossils.
Grade 8 Communities, Populations, and Ecosystems
A(n)                 is all the populations of different species that live in an ecosystem.
  1. organism
  2. community
  3. habitat
  4. ecology
Grade 8 Biomes
What is a biome?
  1. a community of organisms that live in a particular area along with all the abiotic factors
  2. all the members of one species in a particular area
  3. a group of land ecosystems with similar climates and organisms
  4. the study of how living things interact with each other and their environment
Grade 8 DNA, RNA, and Genetics
What refers to the location where genes are typically found?
  1. chromosomes
  2. proteins
  3. alleles
  4. sex cells
Grade 8 Nervous and Endocrine Systems
The largest part of the brain that is divided into two sections is the
  1. cerebellum.
  2. cerebrum.
  3. midbrain.
  4. pons.
Grade 8 Biomes
The vast frozen plains located within the Arctic Circle is the
  1. tundra.
  2. boreal forest.
  3. timberline.
  4. permafrost.
Grade 8 Biomes
Which biome has the most biodiversity?
  1. coniferous forest
  2. tropical rainforest
  3. desert
  4. deciduous forest
Grade 8 Cell Structure and Function
Which statement about plant and animal cells is correct?
  1. Animal cells are irregular in shape; plant cells are regular in shape.
  2. Animal cells are regular in shape; plant cells are irregular in shape.
  3. Both animal and plant cells are irregular in shape.
  4. Both animal and plant cells are regular in shape.
Grade 8 Skin, Skeleton, and Muscles
Which is NOT a function of the skeletal system?
  1. production of red blood cells
  2. storage of fat and calcium
  3. protection of the body's organs
  4. help with movement
  5. support of the body
  6. digestion of food
Grade 8 DNA, RNA, and Genetics
Which definition describes a mutation?
  1. a change in the nucleotide base sequence of a DNA molecule
  2. a molecule that is present in all living cells and plays a role in protein production
  3. a subunit of a nucleic acid chain that consists of a sugar, a phosphate, and a base
  4. a molecule that is present in all living things and stores the information that determines inherited traits
Grade 8 Food Chains and Webs
The last component of the food chain is a
  1. producer.
  2. consumer.
  3. decomposer.
  4. predator.
Grade 8 Botany
The                 gives plants their green color.
  1. nucleus
  2. chromosome
  3. chloroplast
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