SUBSCRIBE
BIOS 100 Exam 1
1. How is discovery-based science different from hypothesis-driven science?:
Answer Discovery Based science- has the goal of finding new information and serves to form new hypotheses. Hypothesis Driven science- uses deduction and the scientific method.
2. What are the steps of the Scientific Method?:
- Do an observation
Ask a question Construct a hypothesis Make a prediction Test the experiment Analyze the results Draw a conclusion
Remember:
Answer A hypothesis is an educated guess to your question, must be testable, and can never be proven!
3. Are large or small sample sizes more accurate for scientific studies?:
Answer Large sample sizes are more accurate for scientific studies because it increase the chance of finding a significant difference and leads to a more precise data.
4. What is the difference between a hypothesis and a scientific theory?:
Answer A hypothesis is an explanation that may or may not have undergone scientific testing, while a theory is a hypothesis that has undergone numerous tests over many years and has accumulated a large body of evidence in support of the explanation.
- What are the six qualities of life? Be able to describe each quality and not just recognize
them.:
Answer 1. All living things have cells - Cell is the smallest unit of life. Cell contains all the material that are necessary for life to exist. Some organisms are unicellular (only one cell) like bacteria, multicellular (many cells) like human. Human cells have different function like for nerves or skin.
- Living things can sense and response to change - Living things response to a stimuli. A
stimuli could include smells (good or bad), taste, sound, heat (touching a hot stove), light or darkness, or gravity. 1 / 3
SUBSCRIBE
Homeostasis:
Answer When an organism responds to changes in order to keep its internal environment the same.
- Living things grow and develop - Development: Living things change and mature as
they grow old over time. Organisms pass through different stages as they grow.Answer
• Single celled organisms: Grow larger.
• Multi-celled organisms: Grow in number of cells.
• Metamorphosis: Is when organisms have a complete change of
body shape. Ex: Capterpillar -> Butterfly or Tadpole -> Frog.
8. What is an emergent property? What quality of life does it have to do with?:
Answer -It's the property where living things become more and more complex as it goes from cellular level to organ system (Some kind of characteristics comes around when two interest come together).-Life requires the ability to grow and reproduce using the information in one's DNA.
9. Why is the ability to evolve important for living things?:
Answer Living things evolve to adapt to their surroundings.
10. How does taxonomy help scientists study life?:
Answer By providing easily remem- bered scientific names for organisms. The more features 2 organisms share, the more taxonomic levels they share. Ranks group to similar organisms.
- Be able to list, in order, the taxonomic hierarchy.Which taxonomic category is the
most specific and which is the most general?:
Answer Domain>Kingdom>Phy- lum>Class>Order>Family>Genus>Species-Domains are most general and species are specific.
12. What are the three domains that include all living things?:
Answer Bacteria: Unicel- lular, found everywhere, some cause disease in humans, but most are beneficial.
- / 3
SUBSCRIBE
-Archaea: Unicellular, often live in extreme conditions, such as environments that are very hot, salty, or acidic.
-Eukarya: Unicellular or multicellular, larger (10-100x), more sophisticated cells.
- Generally, what does an evolutionary tree tell you about the organisms on it?:
- What is the smallest piece of an element that still retains the qualities of the element?:
- What are the components of an atom? What are the characteristics of each of these
Answer How organisms are related.
Answer Atom
components (big vs. little?, charged?, location?):
Answer Each Atom is made of even smaller sub-atomic particles called Protons, Neutrons, and Electrons.Protons = positive charge
Electrons = negative charge Neutrons = no charge
-Protons and neutrons have about equal mass.-Electrons have very little mass.
-Proton and neutron is in the nucleus, where as the electron orbit around the electron shell.
16. What is an isotope?:
Answer All atoms of an element have the same atomic number but not necessarily the same number of neutrons.
17. What do the atomic number and atomic mass tell you about an atom?:
Answer An element's or isotope's atomic number tells how many protons are in its atoms. An element's or isotope's mass number tells how many protons and neutrons in its atoms.
- What is an ion? If an ion has a +2 charge, how is it different from it's original state (what did
- / 3