Upgrade to remove ads
Only $35.99/year

Biology Midterm Exam

Terms in this set (31)

What are the steps of the scientific method
1. Initial observation
2. Hypothesis
3. Experiment
4. Observation and analysis of data
5. Interpretation
6. Final hypothesis supported
What is the difference between observation and inference
An observation is a process of noticing and describing events or process in a careful ordinary way. An inference is a logical interpretation based on prior knowledge and experience
What is the difference between theory and hypothesis
A theory is a well tested explanation that unifies a broad range of observations and hypothesis enabling scientist to make accurate predictions about new situations. A hypothesis is a possible explanation for a set of observations or possible answers to a scientific question
What is the difference between theory and law? Which describes in which explains behavior?
A theory is the well supported explanation and the law is a well supported description. Theories do not become laws and laws do not become theories a well supported hypothesis can become a theory or a law
What is pseudo science? give an example
False science. Example; astrology
How does water differ in a molecular properties to make it special
The oxygen end of a water molecule is negatively charged the hydrogen of a water molecule is positively charged
Describe what would happen to a cell placed in hypotonic hypertonic and Isotonic solution
If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink. In an isotonic environment, the relative concentrations of solute and water are equal on both sides of the membrane. ... When a cell is placed in a hypotonic environment, water will enter the cell, and the cell will swell.
What are the four biological macromolecules
carbohydrates, lipids, proteins, nucleic acids
Name the building blocks of each macromolecule
Carbohydrates - monosaccharides
Lipid- glycerol and fatty acid tail
Protein- amino acid
Nucleic acid- nucleotides
Describe the function of each macromolecule
Carbohydrates- short term energy storage
Lipid- long-term energy storage
Protein-control reaction, fight disease,send messages
Nucleate acids--store and transmit genetic information
What are enzymes
Enzymes are proteins that speed up a chemical reaction by lowering the activation energy also known as catalyst
What number is an acid, base or neutral substance on the pH scale?
Lower than 7 is acid, 7 is neutral
Describe the three statements of cell theory
1. All living things are made of cells
2. Cells are the basic unit of structure and function in living things
3. New cells are produced from existing cells
What are the differences between eukaryotes and prokaryotes
Prokaryotes are smaller, they're simple in structure have no nucleus and cell wall is present. Eukaryotes are larger, have more of a complex structure/many structures, have a nucleus and cell wall is sometimes present
What are the three main differences between plant and animal cells
Plant Cells have a Cell Wall and a Cell Membrane; Animal Cells only have a Cell Membrane. Animal Cells have a Cytoskeleton, but Plant Cells do not. Plant Cells have Chloroplasts, but Animal Cells do not. Plant Cells have a large central water Vacuole; Animal Cells only have small Vacuoles.
Sets with similar terms