BIL 150 - VAN DYKEN (EXAM 1) ACTIVE
LEARNING QUESTIONS WITH 100%
CORRECT SOLUTIONS
What are the 7 characteristics of life? - ANSWER-1. Contains Macros
2. Composed of cells
3. Reproduces
4. Use energy/raw materials
5. Respond to stimuli
6. Homeostasis
7. Adaptation/Evolution
What does structure determine? - ANSWER-structure determines function
What are the 5 unifying themes of biology? - ANSWER-1. Organization
2. Information
3. Energy
4. Interactions
5. Evolution
What are the levels of biology? - ANSWER-atoms, molecules, organelles, cells, tissues,
organs, organisms, population, community, ecosystem, biosphere
What are emergent properties? - ANSWER-New properties that arise with each step
upward in the hierarchy of life, owing to the arrangement and interactions of parts as
complexity increases.
Eurkaryote traits/tendencies? - ANSWER-Large, organelles, multicellular, nucleus
Prokaryote traits/tendencies? - ANSWER-Small, ribosomes, unicellular, no nucleus
What is the unity among organisms? - ANSWER-DNA
What is negative feedback? - ANSWER-A response to a change in the body that
counteracts or opposes the initial change.
What is positive feedback? - ANSWER-Feedback that increases the output of a
process.
1 astronomical unit - ANSWER-The distance from the Earth to the Sun
Atoms are mostly what? - ANSWER-empty space
, Do electrons ever go in the nucleus? - ANSWER-Yes, but their speed/momentum keeps
them from staying there
What is the tennis ball/period visualization? - ANSWER-If a proton was the size of a
tennis ball, an electron would be the size of a period five football fields away
Why is the ring diagram wrong? - ANSWER-Electrons don't move in perfect circles like
that, they move in clouds really fast
How many naturally occurring elements are there? - ANSWER-92
How many naturally occurring do we use? - ANSWER-20-25 percent of them
What are isotopes? - ANSWER-Atoms of the same element with different numbers of
neutrons
What do radioactive isotopes do? - ANSWER-decay spontaneously, giving off particles
and energy
What is electronegativity? - ANSWER-ability of an atom to attract electrons
What does electronegativity determine? - ANSWER-type of bond (ionic or covalent)
How many electrons can the first shell hold? - ANSWER-2 electrons
How many electrons can the second/third shell hold? - ANSWER-8 electrons
Why Oxygen and not Fluorine? - ANSWER-Oxygen is much more abundant and can
form more bonds than Fluorine can
What makes up 96% of living matter? - ANSWER-CHNOPS (Carbon, Hydrogen
Nitrogen, Oxygen, Phosphorus, and Sulfur)
How do you determine if a bond is ionic or covalent? - ANSWER-The difference in
electronegativity must be more than 2
Describe a hydrogen bond - ANSWER-Hydrogen bonds form between a hydrogen atom
that has partial positive charge and another atom, like oxygen or nitrogen, carrying
partial negative charge.
Describe Van der Waals forces - ANSWER-When nonpolar covalent bonds create slight
charge fields, causing weak bonds
Cation - ANSWER-A positively charged ion
LEARNING QUESTIONS WITH 100%
CORRECT SOLUTIONS
What are the 7 characteristics of life? - ANSWER-1. Contains Macros
2. Composed of cells
3. Reproduces
4. Use energy/raw materials
5. Respond to stimuli
6. Homeostasis
7. Adaptation/Evolution
What does structure determine? - ANSWER-structure determines function
What are the 5 unifying themes of biology? - ANSWER-1. Organization
2. Information
3. Energy
4. Interactions
5. Evolution
What are the levels of biology? - ANSWER-atoms, molecules, organelles, cells, tissues,
organs, organisms, population, community, ecosystem, biosphere
What are emergent properties? - ANSWER-New properties that arise with each step
upward in the hierarchy of life, owing to the arrangement and interactions of parts as
complexity increases.
Eurkaryote traits/tendencies? - ANSWER-Large, organelles, multicellular, nucleus
Prokaryote traits/tendencies? - ANSWER-Small, ribosomes, unicellular, no nucleus
What is the unity among organisms? - ANSWER-DNA
What is negative feedback? - ANSWER-A response to a change in the body that
counteracts or opposes the initial change.
What is positive feedback? - ANSWER-Feedback that increases the output of a
process.
1 astronomical unit - ANSWER-The distance from the Earth to the Sun
Atoms are mostly what? - ANSWER-empty space
, Do electrons ever go in the nucleus? - ANSWER-Yes, but their speed/momentum keeps
them from staying there
What is the tennis ball/period visualization? - ANSWER-If a proton was the size of a
tennis ball, an electron would be the size of a period five football fields away
Why is the ring diagram wrong? - ANSWER-Electrons don't move in perfect circles like
that, they move in clouds really fast
How many naturally occurring elements are there? - ANSWER-92
How many naturally occurring do we use? - ANSWER-20-25 percent of them
What are isotopes? - ANSWER-Atoms of the same element with different numbers of
neutrons
What do radioactive isotopes do? - ANSWER-decay spontaneously, giving off particles
and energy
What is electronegativity? - ANSWER-ability of an atom to attract electrons
What does electronegativity determine? - ANSWER-type of bond (ionic or covalent)
How many electrons can the first shell hold? - ANSWER-2 electrons
How many electrons can the second/third shell hold? - ANSWER-8 electrons
Why Oxygen and not Fluorine? - ANSWER-Oxygen is much more abundant and can
form more bonds than Fluorine can
What makes up 96% of living matter? - ANSWER-CHNOPS (Carbon, Hydrogen
Nitrogen, Oxygen, Phosphorus, and Sulfur)
How do you determine if a bond is ionic or covalent? - ANSWER-The difference in
electronegativity must be more than 2
Describe a hydrogen bond - ANSWER-Hydrogen bonds form between a hydrogen atom
that has partial positive charge and another atom, like oxygen or nitrogen, carrying
partial negative charge.
Describe Van der Waals forces - ANSWER-When nonpolar covalent bonds create slight
charge fields, causing weak bonds
Cation - ANSWER-A positively charged ion
