8th Grade Life Science Final

50 Questions | Total Attempts: 623

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8th Grade Quizzes & Trivia

Questions and Answers
  • 1. 
    A trait that helps an organism survive and reproduce is called a(n)d. variation.
    • A. 

      Mutation.

    • B. 

      Selection

    • C. 

      Adaptation.

    • D. 

      Variation. d. variation. d. variation. d. variation. d. variation. variation

  • 2. 
    The gradual change in a species over time is called
    • A. 

      Mutation.

    • B. 

      Evolution.

    • C. 

      Migration

    • D. 

      Variation.

  • 3. 
    An organism’s physical appearance is its
    • A. 

      Genotype

    • B. 

      Phenotype

    • C. 

      Codominance

    • D. 

      Bad luck...except for BSS students of course

  • 4. 
    When sex cells combine to produce offspring, each sex cell will contribute
    • A. 

      One fourth the number of chromosomes in body cells.

    • B. 

      Half the number of chromosomes in body cells.

    • C. 

      The normal number of chromosomes in body cells.

    • D. 

      As many as they can...kind of like a kid stuffing marshmellows in their mouth

  • 5. 
    A DNA molecule is shaped like a
    • A. 

      Long, thin rod

    • B. 

      Straight ladder

    • C. 

      Spiral staircase

    • D. 

      Birthday cake with 30 candles...I'LL NEVER BE THAT OLD!

  • 6. 
    The stage of cellular respiration that releases most of the energy in glucose occurs in the
    • A. 

      Nucleus

    • B. 

      Chloroplast

    • C. 

      Cytoplasm

    • D. 

      Mitochondria

  • 7. 
    If two organisms look very similar during their early stages of development, this is evidence that the organisms
    • A. 

      Are related

    • B. 

      Evolved from different ancestors

    • C. 

      Had no individuality and just went with whatever was popular

    • D. 

      Evolved from a common ancestor

  • 8. 
    Which of the following statements is part of the cell theory?
    • A. 

      Only plants are composed of cells

    • B. 

      All cells are produced from other cells

    • C. 

      Cells can be produced from nonliving matter

    • D. 

      Cells are one of several basic units of structure and function in living things

  • 9. 
    The role of the respiratory system is to bring what substance into the body?
    • A. 

      Water

    • B. 

      Oxygen

    • C. 

      Carbon dioxide

    • D. 

      Helium...the body secretly wants to sound like a chipmunk

  • 10. 
    An organism’s particular role in its habitat, or how it makes its living, is called its
    • A. 

      Carrying capacity

    • B. 

      Ecosystem

    • C. 

      Competition

    • D. 

      Niche

  • 11. 
    A mutation is harmful to an organism if it
    • A. 

      Changes the DNA of the organism

    • B. 

      Changes the phenotype of the organism

    • C. 

      Reduces the organism’s chances for survival and reproduction.

    • D. 

      Makes the organism better able to avoid predators

  • 12. 
    Mitosis is the stage of the cell cycle during which
    • A. 

      The cell’s nucleus divides into two new nuclei

    • B. 

      The cell’s DNA is replicated.

    • C. 

      The cell divides into two new cells

    • D. 

      The cell’s awkwardly smily cousin ted comes to visit

  • 13. 
    What is the function of a cell membrane?
    • A. 

      To support the cell

    • B. 

      To perform different functions in each cell

    • C. 

      To control what enters and leaves the cell

    • D. 

      To form a hard outer covering for the cell

  • 14. 
    The gradual change in species over time is called
    • A. 

      Evolution

    • B. 

      Taxonomy

    • C. 

      Homeostasis

    • D. 

      Flibadeejibbet status

  • 15. 
    The order of the bases along a gene determines the order in which
    • A. 

      Sugars are put together to form a carbohydrate

    • B. 

      Phosphates are arranged in DNA

    • C. 

      Amino acids are put together to form a protein

    • D. 

      Chromosomes are arranged in the nucleus

  • 16. 
    Specialized cells are found only in
    • A. 

      Animals

    • B. 

      Single-celled organisms

    • C. 

      Bacteria

    • D. 

      Multicellular organisms

  • 17. 
    How does a prokaryotic cell differ from a eukaryotic cell
    • A. 

      It is larger

    • B. 

      It does not have a nucleus

    • C. 

      It has no cytoplasm

    • D. 

      It has chloroplasts

  • 18. 
    How does natural selection lead to evolution?
    • A. 

      Stronger offspring kill weaker members of the species

    • B. 

      Helpful variations accumulate among surviving members of the species

    • C. 

      Overproduction provides food for stronger members of the species

    • D. 

      Environmental changes favor weaker members of the species

  • 19. 
    Which of the following best describes the function of mitochondria?
    • A. 

      They convert energy from food molecules into energy the cell can use

    • B. 

      They store energy from food molecules

    • C. 

      They store energy from sunlight

    • D. 

      They walk around the country handing candy to kids in green hats...NOT RED

  • 20. 
    Which of the following is an advantage of solar energy?
    • A. 

      It will not run out for billions of years

    • B. 

      It is not available at night

    • C. 

      No backup energy sources are needed

    • D. 

      It must be collected from a huge area

  • 21. 
    What does the notation Tt mean to geneticists?
    • A. 

      Two dominant alleles

    • B. 

      Two recessive alelles

    • C. 

      Homozugous alleles

    • D. 

      One dominant and one recessive alleles

  • 22. 
    An organisms that has two identical alleles for a trait is
    • A. 

      Codominant

    • B. 

      Tall

    • C. 

      Homozygous

    • D. 

      Heterozygous

  • 23. 
    What does the notation TT mean to geneticists?
    • A. 

      Two dominant alleles

    • B. 

      Heterozygous alleles

    • C. 

      At least one dominant allele

    • D. 

      One dominant and one recessive allele

  • 24. 
    Which component of blood carries oxygen to the body cells?
    • A. 

      Plasma

    • B. 

      Platelets

    • C. 

      Red blood cells

    • D. 

      Really small deliverymen that spilled cherry soda on themselves rock'n out to the element song

  • 25. 
    What evidence suggests that the ancestors of whales once walked on land?
    • A. 

      Fossils of whale-like creatures have been found with legs

    • B. 

      Whales perform a walking motion as they swim

    • C. 

      Whales have similar DNA to birds

    • D. 

      Whales breath through lungs