Exam (elaborations)
Bio 1 Exam 1 correct answer!!
- Course
- BIO 1
- Institution
- Stanford University
Bio 1 Exam 1 correct answer!!
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Q&ABio 1 Exam 1 correct answer!!
What are eukaryotic cells? - Answers Eukaryotic cells are complex
organisms with membrane-enclosed organelle
What are prokaryotic cells? - Answers Prokaryotic cells are simple
celled organisms that lack a nucleus and any membrane-enclosed
organelle
What are the 8 characteristics of life? - Answers Complex,
regulated, responsive, grows, well-adapted, reproduces, uses energy,
carries out complex instructions
What is the hierarchy of life? - Answers atom-> molecule->
organelle-> cell-> tissue-> organs and organ systems-> organism->
population-> community-> ecosystem-> biosphere
Life is what? (Hint: Reason why a virus is not considered alive) -
Answers Life is cellular
What organisms are considered Eukaryotic and Prokaryotic? - Answers
Prokaryotes include bacteria and archaea
Eukaryotes include plantae, protists, animalia, fungi
, Q&A
Define elements, atoms, molecules, compounds, isotopes and ions -
Answers Element- The smallest unit that cannot be broken down
Atoms- Basic unit of elements composed of subatomic particles
Molecules- 2 or more atoms connected by covalent bond
Compounds- 2 or more elements in a fixed ratio
Isotopes- Elements with an increased number of neutrons (Most are stable)
Ions- Positive/Negative charged atoms/molecules
How many elements makeup 96% of living matter, what are the last 4%,
and what are the last 0.01% called? - Answers C H O N make up
96% percent of living matter
the remaining elements are called trace elements.
Trace elements include Na, Mg, P, K, Ca, S, Cl
25 elements are essential for life (17 for simple, 25 for complex).
Compare and contrast the 3 main subatomic particles in terms of their
location, mass, and charge. - Answers Protons are located in the
nucleus with a mass of 1 Dalton and are positively charged
Neutrons are located in the nucleus with a mass of 1 Dalton and are
neutrally charged
Electrons are located in the orbitals surrounding the nucleus with a
negligible mass and are negatively charged
Explain the meaning of the following terms: atomic number, atomic weight,
molecular weight, and mass number. - Answers Atomic number-
Tells the protons and electrons; defines the atom
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