Biology 1201 Study guides, Class notes & Summaries
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Biology 1201 Exam 1 Questions With Verified Answers
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Biology 1201 Exam 1 Questions With 
Verified Answers 
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 
elements make up approximately 96% of living matter? - answerCarbon, Hydrogen, 
Nitrogen, Oxygen 
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? - 
answer6 
Which of these refers to atoms with the same atomic number but different atomic masses? - 
answerIsotopes 
Fluorine's atomic number is 9 and its atomic ma...
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LSU Biology 1201 Exam -Siebenaller | Questions with 100% Correct Answers
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How many quarters of the planet is covered with water? - ANSWER Three-quaters 
What is the average depth of the ocean? For every ___ meters depth increase, pressure 
increases___ atm - ANSWER 3800 meters. 10; 1 
The deep sea is characterized by: - ANSWER Defined as the ocean below either 200 or 1000 
meters. Low temperature, high hydrostatic pressure, and no sunlight. 2-4 degrees celsius 
What doesn't penetrate to the deep sea for photosynthesis? - ANSWER Sunlight
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LSU Biology 1201 Final Exam - gregg | Questions with 100% Correct Answers
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how do animals cells communicate through direct contact? - ANSWER cell junctions connecting 
the cytoplasms or cell - cell recognition from molecules protruding from surface of cell 
attaching to one another 
describe paracrine signaling - ANSWER -The transmitting cell secretes the local regulator 
(chemical signal) into the fluid surrounding the cells of a tissue. 
-The local regulator diffuses across the liquid. 
-The local regulator binds to protein receptors at the cell surface of the target...
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LSU Biology 1201 Exam 3- Gregg| Questions with 100% Correct Answers
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organisms are composed of _______________ 
matter 
anything that takes up space and has mass 
matter 
a substance that cannot be broken down to other substances by chemical reactions 
example: hydrogen 
element 
a substance consisting of two or more elements in a fixed ratio 
example: water (H2O) 
compound 
the smallest unit of matter that still retains the properties of an element 
atom
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LSU Biology 1201 Exam - Gregg| Questions with 100% Correct Answers
- Exam (elaborations) • 21 pages • 2024
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organisms are composed of _______________ 
matter 
anything that takes up space and has mass 
matter 
a substance that cannot be broken down to other substances by chemical reactions 
example: hydrogen 
element 
a substance consisting of two or more elements in a fixed ratio 
example: water (H2O) 
compound 
the smallest unit of matter that still retains the properties of an element 
atom 
atoms are composed of subatomic particles. list the subatomic particles and their charges 
neutron (no charg...
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LSU Biology 1201 Exam 2 Chapter 7 solution update
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LSU Biology 1201 Exam 2 Chapter 7 solution update
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LSU Biology 1201 Exam 2- Gregg| Questions with 100% Correct Answers
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Heredity 
the transmission of traits from one generation to the next 
Variation 
__________ is demonstated by the diffferences in appearance that offspring show from 
parents and siblings 
genetics 
________ is the scientific study of heredity and variation 
genes 
__________ are the units of heredity and are made up of segments of DNA 
gametes 
genes are passed to the next generation via reproductive cellls called ________ (sperm and 
eggs) 
somatic cells 
humans have 46 chromosomes in the nucl...
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Biology 1201 Exam 1 Questions with Correct Answers 2024
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About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter? - Carbon, Hydrogen, Nitrogen, Oxygen 
 
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? - 6 
 
Which of these refers to atoms with the same atomic number but different atomic masses? - Isotopes 
 
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine have? - 10 
 
An uncharged a...
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Biology 1201 Final Exam Questions and answers latest update
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Biology 1201 Final Exam Questions and answers latest update
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LSU Biology 1201 Exam 2024 | Questions with 100% Correct Answers
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why are membranes called phospholipid bilayers? - ANSWER phospholipids have hydrophilic 
head and hydrophobic tail, hydrophobic face inside of cell making 2 layers 
what is meant by fluid mosaic? - ANSWER Mosaic of proteins drifting laterally in fluid bilayer of 
phospholipids 
how are membranes adjusted for different temperatures? - ANSWER membrane fluidity 
adjusted by changing the ratio of unsaturated to saturated fatty acids 
how do the relative amounts of saturated and unsaturated fats chan...
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