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Biology — Intermediate

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IntermediateScience
Today's questions

Today's quiz questions

These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.

  1. 1.What is an adaptation in evolutionary biology?

    • •An individual organism learning new behaviors in its lifetime
    • •A genetic mutation that always improves survival
    • •A heritable trait that improves fitness in an environment
    • •A temporary change in an organism's appearance due to environment

  2. 2.What is the role of enzymes in biochemical reactions?

    • •They are consumed during the reaction they catalyze
    • •They provide energy for reactions to proceed
    • •They slow down reactions to prevent cellular damage
    • •They speed up reactions by lowering activation energy

  3. 3.What is genetic drift?

    • •Random changes in allele frequencies, strongest in small populations
    • •The physical migration of organisms from one place to another
    • •The deliberate selection of traits by breeders
    • •The directed movement of genes toward favorable traits

  4. 4.What is the greenhouse effect?

    • •The reflection of sunlight by ice caps that keeps the planet cool
    • •The warming of greenhouses used for agriculture
    • •Atmospheric gases (CO2, methane) trap heat from the sun, warming Earth's surface above what it would be without an atmosphere
    • •The destruction of the ozone layer by CFCs, allowing UV radiation through

  5. 5.Which type of human cells lack a nucleus?

    • •Neurons
    • •Red blood cells (erythrocytes)
    • •White blood cells (leukocytes)
    • •Muscle cells

  6. 6.What is the function of ribosomes?

    • •To store genetic information
    • •To synthesize proteins by translating mRNA
    • •To break down cellular waste
    • •To produce ATP for energy

  7. 7.What is the Calvin cycle?

    • •The light-independent reactions that fix CO2 into sugars
    • •A cycle of reactions in the mitochondria that produce CO2
    • •The process of nitrogen fixation by root bacteria
    • •The light-dependent reactions that split water and produce O2

  8. 8.Which cell organelle is responsible for energy (ATP) production?

    • •Ribosome
    • •Mitochondrion
    • •Endoplasmic reticulum
    • •Golgi apparatus

  9. 9.What is the function of the Golgi apparatus?

    • •To break down old organelles and waste materials
    • •To produce ATP through cellular respiration
    • •To modify, sort, and package proteins and lipids
    • •To store genetic information in the cell

  10. 10.Approximately how many liters of blood does an adult have?

    • •3 liters
    • •7 liters
    • •5 liters
    • •10 liters