Biology Concepts Quiz

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Questions and Answers

Which process involves the absorption of water by plants in response to gravity?

  • Gravitropism (correct)
  • Phototropism
  • Transpiration
  • Hydrotropism

What is a characteristic feature of addition reactions in organic chemistry?

  • Production of gas
  • Formation of new double bonds
  • Breaking of the molecule into smaller units
  • Combination of reactants to form a single product (correct)

Which concept describes the process by which organisms determine their sex in humans?

  • Natural selection
  • Genetic drift
  • Sex determination (correct)
  • Sexual selection

Which term refers to the structures formed when lipids aggregate in aqueous solutions?

<p>Micelles (C)</p> Signup and view all the answers

What is a key aspect of ecosystems as discussed in biological terms?

<p>They involve interactions between living organisms and their environment. (B)</p> Signup and view all the answers

Flashcards

What are micelles?

Micelles are spherical structures formed by the self-assembly of amphiphilic molecules in a polar solvent, typically water. The hydrophobic tails of these molecules point inwards, forming a core, while the hydrophilic heads point outwards, interacting with the surrounding water.

What is corrosion?

Corrosion is the gradual deterioration of a material, usually a metal, due to a chemical reaction with its environment. It often involves the oxidation of the metal, leading to the formation of oxides, hydroxides, or other compounds.

What are addition reactions?

Addition reactions are chemical reactions where two or more molecules combine to form a larger molecule, without the loss of any atoms. The reaction typically involves the breaking of a double or triple bond and the formation of new single bonds.

Explain regeneration and budding.

Regeneration is the ability of an organism to regrow lost or damaged body parts. Budding is a form of asexual reproduction where a new individual develops from an outgrowth or bud on the parent organism.

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How is sex determined in humans?

Sex determination in humans is primarily determined by the presence or absence of the Y chromosome. Individuals with a Y chromosome (XY) are typically male, while those without a Y chromosome (XX) are typically female.

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