Biology

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Review Biology related questions and content

What is the term for a statement predicting the outcome of an experiment?

  • A. Experiment.
  • B. Hypothesis.
  • C. Conclusion.
  • D. Observation.
Correct Answer: B

Rationale: The correct answer is B: Hypothesis. A hypothesis is a statement that predicts the outcome of an experiment based on prior knowledge or observations. It serves as the foundation for the experiment and guides the research process.

A: Experiment - This choice refers to the actual process of conducting a test or investigation, not the prediction of the outcome.

C: Conclusion - This choice pertains to the final result or summary drawn from the experiment after analyzing the data collected, not the initial prediction.

D: Observation - This choice involves gathering and recording data through direct sensory experience, not making a prediction about the experiment's outcome.

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What is the function of water in photosynthesis?

  • A. Combining with carbon dioxide
  • B. Absorbing light energy
  • C. Supplying electrons in the light reactions
  • D. Transporting hydrogen ions in the dark reactions
Correct Answer: C

Rationale: Water is crucial in photosynthesis as it provides electrons during the light reactions. When water molecules are split in the light-dependent reactions, oxygen is released, and electrons are transferred to photosystem II to initiate the electron transport chain. This process is vital for the production of ATP and NADPH, which are necessary for the Calvin cycle to synthesize sugars.

By what process do sex cells reproduce?

  • A. Cytokinesis.
  • B. Meiosis.
  • C. Mitosis.
  • D. Fission.
Correct Answer: B

Rationale:

Why can animal cells use a contractile ring but plant cells cannot?

  • A. Plant cells can use both methods to divide.
  • B. Animal cells divide faster, requiring them to pinch apart.
  • C. Plant cells are too rigid to utilize a contractile ring.
  • D. Plant cells have a cell wall that hinders the formation of a contractile ring.
Correct Answer: D

Rationale: Plant cells have a rigid cell wall surrounding their cell membrane, which prevents the formation of a contractile ring during cell division. The contractile ring is a structure composed of actin filaments responsible for pinching the cell in two during cytokinesis. Since plant cells cannot form a contractile ring due to the presence of the cell wall, they rely on other methods such as cell plate formation to complete cell division.

Which is an example of the comet organizational hierarchy for a wolf?

  • A. Muscle tissue, blood cell, DNA, organ, circulatory system, wolf.
  • B. Circulatory system, DNA, muscle tissue, blood cell, heart, wolf.
  • C. Blood cell, organ, circulatory system, muscle tissue, DNA, wolf.
  • D. DNA, blood cell, muscle tissue, heart, circulatory system, wolf.
Correct Answer: D

Rationale:

Which of the following is a benefit of the intermolecular hydrogen bonding of water? (Select one that doesn't apply.)

  • A. Water has a relatively high specific heat capacity.
  • B. Water has strong cohesive and adhesive properties.
  • C. Polarity of water allows it to act as a versatile solvent.
  • D. Water moves from higher to lower concentrations.
Correct Answer: D

Rationale: The process described in option D, 'Water moves from higher to lower concentrations,' is not a direct benefit of intermolecular hydrogen bonding of water. Rather, this movement of water from higher to lower concentrations is attributed to osmosis, a phenomenon driven by differences in solute concentrations across a semi-permeable membrane. The other options, A, B, and C, directly result from water's intermolecular hydrogen bonding. Water's high specific heat capacity (A) is due to the hydrogen bonds, which allow water to absorb and release large amounts of heat with minimal temperature change. The strong cohesive and adhesive properties of water (B) are a result of hydrogen bonding, enabling water to stick to other substances. Lastly, the polarity of water (C) due to hydrogen bonding makes it an effective solvent by interacting with various solutes.

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