define one genetic map unit
~ the physical distance between two genes that results in a 1% frequency of recombination
In birds, sex is determined by ZW chromosome inheritance. Males are ZZ and
females are ZW. Within pigeon populations there is a recessive, Z-linked allele that
is lethal in em...
Two isotopes of the same element differ in the number of _____
✓✓~ neutrons
It is the number of ______ in an atom's nucleus that determines what element the
atom is
✓✓~ protons
electronegativity for iconic bond
✓✓~ 1.8 < ∆en
electronegativity for polar covalent bond
✓✓~ 1.2 < ∆en < 1.8
electronegativity for non-polar covalent
✓✓~ ∆en < 1.2
do electrons carry a positive electrical charge
✓✓~ no they are negative. Protons are positive
,Life on earth requires ___ different elements
✓✓~ 25
are hydrogens bonds a type of covalent bond?
✓✓~ No. Covalent bonds share electrons between atoms. Hydrogen bonds are an attraction
between partial positive and negative atoms in polar molecules, but electrons are not shared
between the atoms.
The vast majority of mass in an atom is located in in the ____
✓✓~ nucleus
What does it mean when a chemical reaction is at equilibrium?
✓✓~ The forward reaction rate is equal to the reverse reaction rate
There are four emergent proterties of water that are very important for life.
Water ice floats on liquid water.
Water makes up 60% of your body weight .
Water moderates temperatures .
Water is a very versatile solvent.
Water has cohesion.
✓✓~ Water makes up 60% of your body weight
Acidic solution is one that.....
, ✓✓~ has more hydronium ions than hydroxide ions
True or false: Solid water ice is less dense than liquid water because hydrogen
bonds get locked in place, pushing the water molecules farther apart from each other
than in liquid water.
✓✓~ true
A calorie is defined as ____
✓✓~ The energy needed to heat 1 g of water by 1°C
What is the concentration of hydroxide ions [OH-], in a solution with pH = 11?
✓✓~ [OH-]= 10^-3
what emergent property of water allows some insects ( like water striders) to walk on
the surface of water ?
✓✓~ surface tension
hydrophobic substances can never dissolve in water at all
✓✓~ false
the high specific heat of water
✓✓~ ... helps transfer heat from the equator to the poles
... is caused by the many hydrogen bonds between water molecules
, ...makes sweating cool you off
...makes water need to absorb more energy to heat up 1°C than most substances.
What are the main modes of scientific inquiry
✓✓~ -inquiry-based Science
-mad science
-data-based science
-hypothesis-based science
-hypothesis-based science
-discovery-based science
-rocket science
the most important mechanism that causes evolutionary change is _____
✓✓~ natural selection
True or false: the living organisms on earth today are exactly the same as the living
organisms on earth ten million years ago
✓✓~ False: Evolution changes species over time. Our species (Homo sapiens) has been around
for less than a million years.
The theory of Abiogenesis says that life on earth initially formed from
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