What characterizes life? correct answers 1. Cellular: structure and composition
2. Respond: to the environment
3. Metabolism: energy from chemical reactions
4. Homeostasis: stable inner conditions
5. Heredity: of traits
6. Reproduce: offspring
7. Growth: and development
All living things a...
ISCI 173 Exam 1 (2024) 100% CORRECT ANSWERS.
What characterizes life? correct answers 1. Cellular: structure and composition
2. Respond: to the environment
3. Metabolism: energy from chemical reactions
4. Homeostasis: stable inner conditions
5. Heredity: of traits
6. Reproduce: offspring
7. Growth: and development
All living things are made of cells: correct answers - Cells are the basic unit of life
- Some organisms are unicellular while others are multicellular and composed of trillions of
cells.
ex: Unicellular: bacteria, paramecium, amoeba, chlamydomonas
Multicellular: octopus, humans
All living things maintain homeostasis: correct answers - Homeostasis → steady state
("equilibrium") of internal, physical, and chemical conditions
- Maintaining a regulated balance is important for biological processes to happen
- Ex: PH balance, body temp, H2O, blood sugar
All living things obtain and use energy correct answers - If you are alive you need to have
some way to capture energy and use energy for the biological process and metabolic reactions
- Ex: food chain, metabolism
All living things reproduce: correct answers all organisms produce new individual organisms,
either sexually or asexually
- ex: Cells, birds, plants
All living things grow and develop correct answers - Living organisms grow and develop
along a specific sequence based on the instructions present in their genes
- ex: Baby to adult, egg to frog
All living things respond to the environment correct answers - Living organisms respond to
internal and external stimuli in their environment
- ex: Changes in leaf color of plants, Humans pulling away from hot stove, Plants growing
towards lights
All living things have to ability to adapt to their environment correct answers - Living
organisms pass on their traits via genetic information. Individuals with variant traits that
increase their success are more likely to pass on their genes onto offspring
- ex: Evolution/ population adaptation
Are viruses alive? correct answers no because they require a host to produce energy and
move
Bacteria correct answers - Small, but bigger than a virus (200-1000 nm)
- Structure: single cell-DNA and other contents enclosed by cell membrane and wall
- Reproduce independently
- Contain ribosomes and generate ATP
, Virus correct answers - very, very small (<200 nm)
- structure: acellular- genetic material (RNA or DNA) contained in a protein coat
- cannot reproduce independently
- do not contain ribosomes or generate ATP
Levels of organization correct answers atoms → molecules→ cell→ tissue→ organ→ organ
system→ organism→ population→ community→ ecosystem→ biome→ biosphere
Is there a linear approach to science? correct answers No! Real process is complex and can
take many different paths.
What Is the heart of science? correct answers Inquiry
How is science intertwined with society correct answers It can be funded by certain groups to
create new tech or solve everyday problems
What is science? correct answers Focuses on natural world, aims to explain natural world,
uses testable ideas, relies on evidence, involves scientific community, leads to ongoing
research
What is a hypothesis? correct answers A proposed explanation for an observation (or set of
observations) about the natural world
What are the key features of a hypothesis? correct answers 1. Testable
2. Based on observation, scientific knowledge and/or experience,
3. reasoned and informed
4. Should also be if, then, and because
What they are not:
1. Questions
2. Predictions
3. The terms hypothesis, theory and law are not hierarchical
What is the nature of science? correct answers key ideas which provide a description of
science as a way of learning, as well as characteristics of scientific knowledge
Things to know about science correct answers 1. Science is a process, not a universal method
2. All scientific knowledge is a combo of observations and inferences
3. Science is based on empirical evidence
4. Scientific knowledge is simultaneously reliable and subject to change
5. Scientific laws and theories are separate kinds of scientific knowledge
6. Science can be subjective
7. Science is creative
8. Science is collaborative
9. Science is socially and culturally situated
What is a Scientific theory? correct answers a comprehensive explanation of some aspect of
nature that is supported by a vast body of evidence
- answers the why, hypothesis
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ProPerfomer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £9.20. You're not tied to anything after your purchase.
