Unicellular vs Multicellular
What is a unicellular organism?
An organism made of a single cell
What is a variable in a scientific experiment?
A factor that can change.
What is the first step in the scientific method?
Asking a question or identifying a problem.
What is Newton's first law of motion?
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.
What is DNA?
DNA (deoxyribonucleic acid) is the molecule that carries genetic instructions for the development and functioning of living organisms.
Give an example of a unicellular organsim
Ex: Bacteria (answers will vary)
What is the independent variable?
The one variable that is changed in an experiment
Define a hypothesis
A hypothesis is a testable prediction or educated guess about the outcome of an experiment.
Define potential energy.
Potential energy is stored energy an object has due to its position or condition.
What is the role of alleles in inheritance?
Alleles are different forms of a gene that determine specific traits inherited from parents.
What is a multicellular organism?
An organism made up of multiple cells.
What is the dependent variable?
The variable that is measured in response to changes.
What is the difference between qualitative and quantitative data?
Qualitative data describes characteristics or qualities (e.g., color, texture), while quantitative data involves numbers and measurements (e.g., length, mass).
What is the formula for calculating DISTANCE?
D=RT
Define dominant and recessive traits.
Dominant traits are expressed when at least one dominant allele is present; recessive traits are only expressed when two recessive alleles are present.
What is a benefit of being a multicellular organism?
Specialization of cells for different functions.
Why is it important to control variables in an experiment?
To ensure that the experiment is fair and results are valid.
Describe the purpose of a controlled experiment.
A controlled experiment tests the effect of a single variable while keeping all other variables constant.
Explain the concept of friction and its effects.
Friction is a force that opposes motion between two surfaces in contact, causing objects to slow down or stop.
What technology is used to alter genes?
Genetic engineering, including techniques like CRISPR.
Give an example of a multicellular organism that we student in class.
Answers will vary (fast plants, coleus, blackworms, onion).
Give an example of a controlled variable in the experiment:
A scientist wants to determine what type of light grows the best roses.
Time under light, distance from light, plant type, amount of soil, amount of water (answers will vary)
Explain why peer review is important in scientific research.
Peer review helps ensure the validity, accuracy, and credibility of scientific findings by having other experts evaluate the research before publication.
How does the law of conservation of energy apply to roller coasters?
The total energy remains constant; potential energy at the top of the coaster is converted to kinetic energy as it descends and vice versa.
Explain the difference between genotype and phenotype.
Genotype is the genetic makeup of an organism; phenotype is the observable physical or behavioral traits.