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Questions and Answers
What could be a potential reason for hybridization between the green turtle and hawksbill turtle in the Southeast Pacific?
What could be a potential reason for hybridization between the green turtle and hawksbill turtle in the Southeast Pacific?
Which aspect of a scientific report assesses the clarity of communication regarding its findings?
Which aspect of a scientific report assesses the clarity of communication regarding its findings?
Which factor affected the rate of diffusion in the experiment with potassium permanganate?
Which factor affected the rate of diffusion in the experiment with potassium permanganate?
How does establishing hypotheses contribute to the research process?
How does establishing hypotheses contribute to the research process?
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What was the result of the diffusion of potassium permanganate in distilled water compared to tap water?
What was the result of the diffusion of potassium permanganate in distilled water compared to tap water?
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Which component of a scientific report helps identify the main objective of the research?
Which component of a scientific report helps identify the main objective of the research?
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What characteristic is essential for the results section of a scientific report?
What characteristic is essential for the results section of a scientific report?
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What is a strength of documenting the research process in scientific reports?
What is a strength of documenting the research process in scientific reports?
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What is the purpose of covering the mouth of the test tube with longganisa skin?
What is the purpose of covering the mouth of the test tube with longganisa skin?
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Which solution is considered hypotonic in the experiment with red blood cells?
Which solution is considered hypotonic in the experiment with red blood cells?
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What result is observed after immersing the test tube containing the sucrose solution in distilled water?
What result is observed after immersing the test tube containing the sucrose solution in distilled water?
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What happens to the water during the process of osmosis in this experiment?
What happens to the water during the process of osmosis in this experiment?
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What does an isotonic solution mean in the context of this experiment?
What does an isotonic solution mean in the context of this experiment?
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What is the primary role of cholesterol in the cell membrane?
What is the primary role of cholesterol in the cell membrane?
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Which type of transport requires energy to move substances across the cell membrane?
Which type of transport requires energy to move substances across the cell membrane?
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Which type of membrane protein is involved in molecule transfer and can penetrate the hydrophobic interior of the lipid bilayer?
Which type of membrane protein is involved in molecule transfer and can penetrate the hydrophobic interior of the lipid bilayer?
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What is the effect of a hypertonic solution on plant cells?
What is the effect of a hypertonic solution on plant cells?
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Which of the following correctly describes the sodium-potassium pump?
Which of the following correctly describes the sodium-potassium pump?
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What characterizes a graded potential in neurons?
What characterizes a graded potential in neurons?
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Which type of fatty acid results in a liquid state at room temperature?
Which type of fatty acid results in a liquid state at room temperature?
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What occurs during endocytosis in a cell?
What occurs during endocytosis in a cell?
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Which molecules primarily make up the structure of the cell membrane?
Which molecules primarily make up the structure of the cell membrane?
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What is the typical resting membrane potential of a neuron?
What is the typical resting membrane potential of a neuron?
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In which type of membrane transport is a hydrophilic pore created by proteins?
In which type of membrane transport is a hydrophilic pore created by proteins?
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What happens to cells in an isotonic solution?
What happens to cells in an isotonic solution?
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Which type of endocytosis involves the ingestion of liquid particles?
Which type of endocytosis involves the ingestion of liquid particles?
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What is the main function of glycolipids in the cell membrane?
What is the main function of glycolipids in the cell membrane?
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Which dye diffused the farthest in the colloid experiment?
Which dye diffused the farthest in the colloid experiment?
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What was the purpose of using dialysis in the experiments?
What was the purpose of using dialysis in the experiments?
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Which factor does NOT affect diffusion time in the colloid experiment?
Which factor does NOT affect diffusion time in the colloid experiment?
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What was used to secure the dried longganisa skin during the dialysis experiment?
What was used to secure the dried longganisa skin during the dialysis experiment?
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During the dialysis experiment, which test tube produced a white, cloudy precipitate first?
During the dialysis experiment, which test tube produced a white, cloudy precipitate first?
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How does molecular size affect diffusion through a membrane?
How does molecular size affect diffusion through a membrane?
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Which reagent was added to the first test tube during the dialysis experiment to test for chloride ions?
Which reagent was added to the first test tube during the dialysis experiment to test for chloride ions?
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In the context of diffusion, which factor would increase the diffusion rate?
In the context of diffusion, which factor would increase the diffusion rate?
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What is the role of diploidy in eukaryotic reproduction?
What is the role of diploidy in eukaryotic reproduction?
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Which neurotoxin inhibits the release of acetylcholine (ACh) from neuron terminals?
Which neurotoxin inhibits the release of acetylcholine (ACh) from neuron terminals?
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What is a significant outcome of recombination during meiosis?
What is a significant outcome of recombination during meiosis?
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Which of the following describes homologous chromosomes?
Which of the following describes homologous chromosomes?
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What is a disadvantage of genetic variability?
What is a disadvantage of genetic variability?
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How does Sarin nerve gas affect neurotransmission?
How does Sarin nerve gas affect neurotransmission?
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What advantage does diploidy provide during meiosis?
What advantage does diploidy provide during meiosis?
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What is the primary characteristic of the pufferfish neurotoxin?
What is the primary characteristic of the pufferfish neurotoxin?
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Study Notes
Lab 1: Writing a Scientific Report
- Hybridization first recorded between green sea turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata) in Southeast Pacific.
- Overlapping habitats and population size disparity may contribute to hybridization.
- Evidence includes morphological characteristics and lineage identification of hybrid sample found in El Ñuro.
- Importance of clear communication of findings for replication and documentation purposes.
- Establishing hypotheses aids in guiding experiments.
Lab 2: Transport of Substances Across the Cell Membrane
- Key factors influencing molecular movement across cell membranes: molecular weight, concentration gradient, temperature, viscosity, solubility, surface area, and agitation.
- Diffusion in Water: Potassium permanganate diffused faster in distilled water due to fewer impurities.
- Diffusion in Colloid: Methylene blue exhibited the greatest diffusion due to lower viscosity compared to potassium permanganate and congo red.
- Dialysis Experiment: Chloride ions diffused faster than calcium ions through a semi-permeable membrane made with longganisa skin.
- Osmosis: Water movement across a semipermeable membrane from low to high solute concentration; observed weight increase in yeast solution.
- Osmosis in Red Blood Cells: Changes in cell diameter observed in response to different NaCl concentrations (hypotonic, isotonic, hypertonic).
Quick General Notes on Cell Transport
- Cell Membrane Composition: Phospholipid bilayer with hydrophilic heads and hydrophobic tails; integral and peripheral proteins contributing to transport and signaling.
- Passive Transport: Does not require energy; includes simple diffusion and facilitated diffusion through proteins.
- Active Transport: Requires energy (ATP); involves moving molecules against the concentration gradient, utilizing primary and secondary transport mechanisms.
- Bulk Transport: Includes endocytosis and exocytosis for large molecules; receptor-mediated endocytosis selectively internalizes substances.
Lab 3: Action Potential (Inhibitory and Excitatory Responses)
- Neuron resting potential is approximately -70mV, maintained by sodium-potassium pump.
- Graded potentials are generated by neurotransmitters’ stimulation from connected neurons, leading to action potentials if the threshold of -55mV is reached.
- Neurotoxins like botulinum toxin and sarin interfere with neurotransmitter function, blocking sodium channels or preventing acetylcholine breakdown, affecting neural transmission.
Lab 4: Diploidy and Genetic Variability
- Diploidy: Condition with two sets of chromosomes; key factor in eukaryotic evolution and bisexual reproduction.
- Homologous Chromosomes: Pairs in diploid cells that facilitate genetic recombination during meiosis, creating unique gametes.
- Genetic Variability: Positive aspects include adaptation and evolutionary diversity; negative aspects can include genetic disorders and diseases.
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Description
This quiz focuses on the critical elements of writing a scientific report, specifically regarding the hybridization of Chelonia mydas and Eretmochelys imbricata sea turtles. You'll evaluate aspects such as problem statements, hypothesis formulation, and discussion alignment. Test your understanding of scientific reporting standards and clarity.
