Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with Rationales Guaranteed Pass
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Bio Sci 93:
Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with Rationales Guaranteed Pass
What are the properties of life? - Answers -
1. Order
2. Evolutionary adaptation
3. Regulation
4. Energy processing
5. Growth and development
6. Response to the enviroment...
Bio Sci 93: Midterm 1 study guide Exam
Questions with Revised Correct Detailed
Answers with Rationales Guaranteed
Pass
What are the properties of life? - Answers -✔✔
1. Order
2. Evolutionary adaptation
3. Regulation
4. Energy processing
5. Growth and development
6. Response to the enviroment
7. Reproduction What are emergent properties in order from smallest to biggest? -
Answers -✔✔ 1. Molecules
2. Organelles
3. Cells
4. Tissues
5. Organs
6. Organisms
7. Populations
8. Communities
9. Ecosystems
10. The Biosphere
Cells are... - Answers -✔✔ an organisms basic unit of structure and function
True or false: The cell is the LOWEST level of structure capable of performing all the
activities of life - Answers -✔✔ True
What do ALL cells share in common? - Answers -✔✔ 1. Are enclosed by a membrane
2. Use DNA as genetic information
All life is based on ________ information - Answers -✔✔ heritable
Do all forms of life use the SAME genetic code? - Answers -✔✔ Yes, we all have the
same genetic code, although different genes are expressed differently
What does it mean if organisms are open systems? - Answers -✔✔ 1. They exchange
energy and materials with surroundings
2. The energy exchange involves transformation of energy from one form to another
,What is an example of structure fits function ("form fits function")? - Answers -✔✔ Bird
wing-structure or rabbits ears and homeostasis
What is the structural organization of cells? - Answers -✔✔ 1. Atoms (O,H,C) which are
the foundation
2. Molecules (lipids, proteins, etc) which are formed by combinations of atoms
3. Cells, which are formed by combinations of molecules
Elements cannot... - Answers -✔✔ be broken down into other substances
How many natural elements are there? - Answers -✔✔ 92 natural elements
How many elements are essential for life? - Answers -✔✔ 25 essential elements
How much percent of living matter is made from the 4 elements of C, O, N, H? -
Answers -✔✔ 96% of living matter
What are 4 trace elements? - Answers -✔✔ Fe - Iron
I - Iodine
Zn- Zinc
Cu - Copper
What are atoms? - Answers -✔✔ the smallest units of chemical elements
What are molecules? - Answers -✔✔ Two or more atoms combined
What are compounds? - Answers -✔✔ molecule made up of 2 or more elements
combined in a fixed ratio
NaCl (sodium chloride/table salt) is an example of a what? - Answers -✔✔ Compound
Atoms use ____________ _________ to combine and form molecules and compounds
- Answers -✔✔ chemical bonds
, What are the 2 strong bonds? - Answers -✔✔ 1. Covalent
2. Ionic
What is a covalent bond? - Answers -✔✔ the sharing of electrons by two atoms
Tip to remember: Co-workers share jokes together
What is an ionic bond? - Answers -✔✔ the transfer of electrons between two atoms
*in ionic bonds, electrons will be transferred because one atom will need an electron to
complete its full shell. The other atom transfers it over so that it can also be happy since
they do not want that electron
Ionic bonds occur between... - Answers -✔✔ a metal and a non-metal
Covalent bonds occur between - Answers -✔✔ a non-metal and another non-metal
Water is an example of a ________ bond. Why? - Answers -✔✔ covalent bond
This is because hydrogen and oxygen are both non-metals so they will share electrons
Ammonia, NH3, is an example of a _______ bond. Why? - Answers -✔✔ covalent
bond
Because nitrogen and hydrogen are both non-metals, they will share electrons
Sodium Chloride (NaCl/ Table salt) is an example of a _______ bond. Why? - Answers -
✔✔ ionic bond
This is because sodium (Na) is a metal, whereas chlorine (Cl) is a metal. More
importantly, chlorine has 7 valence electrons and sodium has 1 valence electron.
Chlorine wants to complete its full shell of 8 electrons, so it wants sodium to donate its
one electron. Sodium decides to donate that one electron because it rather give up the
electron to have a positive charge.
What is a weak bond? - Answers -✔✔ hydrogen bond
What is a hydrogen bond? - Answers -✔✔ When the H atom forms one covalent bond,
and a second weaker bond "the hydrogen bond" with an atom in another molecule
What are the two types of covalent bonds? - Answers -✔✔ non-polar and polar
A non-polar covalent bond is... - Answers -✔✔ the equal sharing of electrons
Think of: you are NOT (non) happy when you have to EQUALLY share your candy
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