other Flashcards
define density
how heavy something is for its size
Celsius of boiling water
100C
Celsius human body temp
37C
Fahrenheit of boiling water
212F
Fahrenheit normal room temp
72F
Celsius of freezing water
0C
Celsius of normal room temp
22C
Fahrenheit of freezing water
32F
Fahrenheit human body temp
98.6F
what are the four general parts of the scientific method?
observation, questioning, hypothesis, logical investigation
what is the difference between a theory and a hypothesis
theory is well tested while a hypothesis is unproven
why is “it’s just a theory” misleading?
people usually say it as if it’s false
what is a conflict of interest?
when a person’s interests could interfere with their judgment, decisions, or actions in the workplace.
example of a conflict of interest
being a judge or jury for a family member in court
five themes of biology
evolution, interdependence, unity in the Diversity, homeostasis, and structure=function
how is unity with diversity represented?
tree of life
define abiotic
non-living
homeostasis
too much is bad, too little is bad
examples of homeostasis
salt and fat
define bond
the attraction between ions or atoms
What is the secret to a healthy diet
calories consumed = calories burned
what is a calorie?
a measurement unit
define organic
made of carbon
simple formula for glucose
C6H12O6
cell theory
- all living things are made up of one or more cells
- cells are the basic unit of structure and function
- cells come from existing cells
what is the difference between prokaryotic & eukaryotic cells
prokaryotic = no nucleus, no organelles, smaller
eukaryotic = nucleus, organelles, larger
why is prokaryotic a good term for what it describes
because pro means before and kary means nucleus
chemical formula for cellular respiration in symbols
CO2 + H2O + energy
chemical formula for cellular respiration in words
takes glucose, glucose reacts with oxygen, releases carbon dioxide, water and energy
why do you need oxygen to stay alive?
glucose and oxygen have to be present for our body to have energy
how many total cells do humans have?
approx. 35-70 trillion cells
how many diff cells do humans have?
260
3 way proteins can be diff from each other
N - number of amino acids
T - types of amino acids
A - arrangement of amino acids
how is DNA diff from RNA?
DNA is longer, double-stranded, and stays in the nucleus
RNA is shorter, single-stranded, and diff types travels out the nucleus
why must cells remain small?
maximize their ratio of surface area to volume.
what is a nucleotide
basic building block of nucleic acids (DNA & RNA)
what are nucleotides made of
Sugar, Nitrogenous Base., Phosphate Group.
are all calories created equal?
yes and no, increased amount of different foods led to different outcomes on the scale
is there a single superfood
no
surface area to volume example
they serve 2 smaller patties b/c twice as much heat can enter and that is doubling the surface area
ways to maintain a healthy diet
eat in moderation, choose natural-looking food, be an omnivore, get exercise
what is the licensing effect
giving yourself permission to do unhealthy things
what were the authors? personal results with the licensing effect
he felt virtuous
what are the main points of the movie Farm Inc.
- the way we eat has changed in the last 50 years
- animals and farmers are being abused
- Top 4 meat companies control 80% of our foods
- Corn is in everything
- Income is the #1 predictor of obesity
define diffusion
movement of molecules from an area of high concentration to lower concentration (perfume)
define osmosis
diffusion of water
define solute
the substance that is dissolved (added)
define solvent
the substance in which the solute dissolves (what the solute was added to)
define hypertonic
the solution with the greater concentration of solutes
define hypotonic
the solution with the lesser concentration of solutes
isotonic
the solution with the equal concentration of solutes
what is the relationship between diffusion and osmosis?
osmosis is a type of diffusion
examples of diffusion
perfume
how are plant cells different from animal cells?
plant cells have a cell wall
photosynthesis in words
plants transform light energy into chemical energy
photosynthesis formula
6CO2 + 6H2O → C6H12O6 + 6O2
what are the two general subprocesses cellular respiration can be divided into
glycolysis & aerobic respiration
3 differences between glycolysis & aerobic respiration
glycolysis can survive without oxygen,
define gamete
reproductive cell of an animal or plant
define zygote
fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm)
define chromatin
complex of DNA and protein found in eukaryotic cells
define chromosomes
rod shaped structures made of DNA and proteins
define autosome
any chromosome not considered a sex chromosome
what is the difference between mitosis and meiosis?
mitosis produces all body cells, but meiosis creates only germ cells