everything 2 Flashcards
photosynthesis takes place in which organelle of a photosynthetic, eukaryotic organisma. nucleusb. chloroplastc. ribosomed. endoplasmic reticulum
b. chloroplastthe chloroplast houses the photosynthetic machinery
the process of organisms with advantageous traits surviving more often and producing more offspring than organisms without these advantageous traits describe which basic mechanism of evolution?a. gene flowb. genetic driftc. mutationd. natural selection
c. natural selectionthe mechanism of NS is rooted in the idea that there is variation in inherited traits among the population of organisms that there is differential reproduction as a result
which of the following is NOT a form of reproductive isolation that could lead to sympatric speciation?a. behavioral isolationc. mechanical isolationc. temporal isolationd. habitat isolation
d. habitat isolationsympatric speciation occurs to populations within the same habitat
which of the following taxonomic ranks is the most specific, consisting of organisms that only interbreed with one another?a. phylumb. speciesc. genusd. population
b. speciesspecies is a principal taxionomic rank
what is the primary function of the respiratory system?a. to create sound and speechb. to take oxygen into the body while removing carbon dioxidec. to transport nutrients to the cells and tissue of the bodyd. to act as a barrier between the body’s organ and foreign pathogens
b. to take oxygen into the body while removing carbon dioxideoxygen intake and carbon dioxide disposal are the primary functions of the respiratory system
which muscular organ processes food material into smaller pieces and helps mix it with saliva?a. pharynxb. tonguec. diaphragmd. stomach
b. tongue
the primary function of the root system is to a. anchor the plantb. prevent water lossc. deliver nutrients to all parts of the plantd. absorb water and nutrients from the soil
d. absorb nutrients from the soilthe roots primarily exist to continually grow towards water ad absorb it and other nutrients
which of the following is an evolutionary advantage of the angiosperms, giving them the competitive edge over other groups of plants?a. broad leaves that absorb more sunlight for photosynthesisb. the ability to be perennial, living and growing year after yearc. fruit that nourishes the developing seedd. flowers that attract pollinators, ensuring more successful plant fertilization
d. flowers that attract pollinators, ensuring more successful plant fertilizationthe attractive nature of the flower encourages animals to pollinate the plant
which organism is a primary consumer?a. mushroomb. cornc. cowd. lion
c. cowcows eat plants but do not eat other animals; therefore, cows are primary consumers.lions eat other consumers, which makes them a secondary or tertiary consumer
which of the following terrestrial biomes is tropical, dominated by grasses, and has poor soil?a. taigab. estuaryc. chaparrald. savanna
d. savannaa savanna is a tropical grassland with nutrient-poor soil
an atom has 5 electrons and 12 protons. what is the total charge of the atom?a. -17b. -7c. +7d. +17
c. +7this atom has a total charge of -5e+ 12e= 7e
which type of chemical reaction takes place when kerosene reacts with oxygen to light a lamp?a. oxidationb. neutralizationc. combustiond. convection
c. combustioncombustion is a chemical reaction that produces carbon dioxide and water. burning lamp oil (fuel) is combustion
the state of matter at which particles are most loosely packed isa. liquidb. gasc. solidd. plasma
b. gasgas is the state of matter in which atomic particles are most loosely packed, and the greatest amount of space exists among atoms
the rate at which velocity changes isa. powerb. forcec. displacementd. acceleration
d. acceleration
a box sliding down a ramp experiences all of the following forces EXCEPTa. tensionb. frictionc. gravitationald. normal
a. tensiontension is the force that results from objects being pulled or hung
which type of potential energy is stored in a compressed spring?a. chemical potential energyb. electric potential energyc. gravitational potential energyd. elastic potential energy
d. elastic potential energy
which process allows the transfer of heat to occur from the contact between two substances?a. conductionb. convectionc. radiationd. sublimation
a. conductionconduction is the transfer of heat from the contact of a solid or liquid to another solid or liquid
which measurement describes the distance between crests in a wave?a. amplitudeb. wavelengthc. frequencyd. period
b. wavelengthwavelength is the length of each cycle of the wave, which can be found by measuring between crests
two negative charges are held t a distance of 1 m from each other. When the charges are released, they willa. remain at restb. move closer togetherc. move farther apartd. move together in the same direction
c. move farther apartthe two charges are both negative, so they will repel each other and move apart
which medical technology can be used to detect cancerous tumors?a. MRIb. defibrillatorc. EKGd. patient monitor
a. MRIMRI stands for magnetic resonance imagine and is used to observe organs and internal structures
which is a nonrenewable natural resource?a. waterb. windc. coald. sun
c. coalcoal is a nonrenewable resource that comes from the remains of plants that lived in swamps millions of years ago
which step should students take before making a hypothesis in a scientific experiment?a. interpret datab. make a graphc. researchd. do the experiment
c. researchthey need to do research before making a reasonable and testable hypothesis
evolution is an example of which of the following?a. theoryb. lawc. hypothesisd. fact
a. theoryevolution is a scientific theory, which is a set of explanatory ideas sustained by evidence through repeated experiments and observations
which of the following is the variable in a scientific investigation that is manipulated by the researcher in order to test the hypothesis?a. controlb. experimentalc. dependentd. hypothetical
b. experimentalexperimental variables, aka independent variables, are the variables that are changed by the scientist
what is the earths only natural satelite?
the moon
what are earth's months based on?
moons rotation around the earth
what do fossils give us?
a record of how life on earth has changed over time
what don't fossils give us complete evolution?
because not all organisms get preserved and not all fossils are found
How were the Hawaiian Islands formed?
stationary hot spots that came from the outer core
how did one hot spot in hawaii form all the islands?
the pacific tectonic plate moved over the course of thousands of years therefore creating multiple islands
what are gametes?
sperm and egg cells
what are zygotes?
fertilized eggs
What are haploid cells?
when you have 23 chromosomes (n)
what are diploid cells?
when you have 46 chromosomes (2n)
What are earth's compositional layers?
Crust/Lithosphere, mantle, core
crust (compositional layer)
Outermost solid layer and made
What material is in the Mantle (compositional layer)?
not liquid, composed of aluminum, silicates, & plastic
Lithosphere (mechanical layer)
outer most, rigid, earth's crust
What material is in the Asthenosphere (mechanical layer)?
not a liquid, soft plastic
What material is in the Mesosphere (mechanical layer)?
material flows but at a slower rate, stiff plastic
What material is in the outer core (mechanical layer)?
layer of liquid iron and nickel, only layer of earth that is a true liquid
What does the Hydrosphere contain? (Earth's Spheres)
all water on earth in liquid form (lakes, rivers, oceans)
What does the biosphere contain? (earth's sphere)
all ecosystems and living organisms
What does the cryosphere contain? (earth's sphere)
masses of frozen water (frozen lakes, rivers, oceans, glaciers)
What are Earth's Spheres?
lithosphere, hydrosphere, biosphere, cryosphere, atmosphere
What is in the atmosphere (earth's sphere)?
gasses that surround the planet
What gasses surround the planet?
nitrogen: 78%, oxygen: 21%, argon: 0.09%, helium: small traces, neon: small traces
What are the compositional layers?
crust, mantle, core
What are the mechanical layers?
lithosphere, asthenosphere, mesosphere, outer core, inner core
What are Earth's atmosphere?
troposphere, stratosphere, mesosphere, thermosphere, exosphere
What occurs in the Troposphere?
most weather occurs here, 0-12 km
What occurs in the stratosphere? What does it absorb?
ozone layer, 12-50 km, absorbs 97-99% of suns ultraviolent light
How many km is the mesosphere?
50-80 km
How many km is the thermosphere?
80-700 km
How many km is the exosphere?
700-1000 km
what processes happen in the lithosphere?
geographic landscapes are formations made by rocks
What are the formations in the lithosphere?
mountains, volcanoes, canyons
how are mountains formed?
formed from the tectonic plates smashing together
How are volcanoes formed?
formed when magma from the earth's upper mantle erupts through the surface
How are canyons formed?
formed by weathering and erosion caused by movements in rivers and by tectonic plate activity
what causes earthquakes?
by plates rubbing against each other in an opposite motion which causes rocks underground to break along the fault therefore this causes energy to be released causing seismic waves
what are the magnitude ratings?
3-4.9= minor or light, 5-6.9= moderate to strong, 7-7.9= major, 8 or more= great
what are the types of seismic waves?
primary (p waves), secondary (s waves), surface
what are primary waves (p waves)?
fastest waves ( 3 miles per second), can travel through solid, liquid, gases
what are secondary waves (s waves)?
travel through earth's interior at half the speed of p waves (1.5 miles per second), can travel through rock but not liquid or gas
what are surface waves?
move along earth's surface, slowest waves
what are tsunamis?
giant waves cause by earthquakes or volcanic eruptions under the sea
what happens when tsunamis travel inland?
they build up to higher and higher heights as the depth of the ocean decreases
what does tsunamis speed depend on?
ocean depth
what is plate tectonic theory?
earth's outer shell is divided into several plates that glide over the mantle or the rocky inner layer above the core
what does plate tectonic theory do?
the plates move and separate causing earth to separate and change
what are the types of plate tectonics?
divergent, convergent, and subduction
what does divergent mean?
to pull apart
what does convergent mean?
they come together
what does subduction mean?
sideways and downward movement of the edge of a plate into the mantle beneath another plate
what is soil?
mixture of minerals, organic matter, gases, liquids that support life on earth
what are layers of soil in order?
topsoil, subsoil, bedrock
what is the water cycle?
the continuous circulation of water throughout earth and earth's atmosphere
what is another name for the water cycle?
hydrologic cycle
what are the main stages of the water cycle?
evaporation, condensation, precipitation, transpiration
What is precipitation?
Any form of water that falls from clouds and reaches Earth's surface (rain & snow)
what is evaporation?
when water turns from a liquid to a gas (water vapor)
what is condensation?
gas (water vapor) turns back into a liquid, water collects as droplets on a cold surface when humid air is in contact with it, forming clouds
What is transpiration?
plants suck water from the roots into the small pores in leaves which releases gas (water vapor) the atmosphere
how old in earth?
4.5 billion years old
what is an eon?
a very long period of time
When was the Hadean Eon formed?
4.5 billion
What were the temperatures and activities that formed in the Hadean Eon?
temperatures were extremely hot and volcanic activity
What kind of life was in the Hadean Eon?
no life
What was the Hadean Eon formed by?
formed by debris around the solar protoplanetary disk
what key feature formed in the Hadean Eon?
the moon
When was the Archean Eon formed?
2.5 billion
What kind of life was formed in the Archean Eon?
prokaryote and other first forms of life
What was the atmosphere composed of in the Archean Eon?
volcanic and greenhouse gasses
When was the Proterozoic Eon formed?
541 billion
What kinds of life were formed in the Proterozoic Eon?
eukaryote, multicellular organisms, bacteria began producing oxygen, plants, animals, early fungi formed
What did the Proterozoic Eon do for earth's atmosphere?
shaped the third & current of earth's atmosphere
What kinds of life formed in the Phanerozoic Eon?
complex life including vertebrates begin to dominate the ocean, familiar forms of plants, animals, and fungi, animals including humans evolve at the most recent phase
When was the Phanerozoic Eon formed?
541 million- present
what are rocks?
naturally occurring solid mass or aggerate of minerals or mineraloid matter
how are rocks categorized?
by minerals they include, chemical composition, and formation (origin)
what are the 3 categories of rocks?
igneous, metamorphic, sedimentary
what are igneous rocks made of?
lava & magma
what do igneous rocks look like?
glassy, smooth, gas, bubble holes, random arrangement of minerals
what are examples of igneous rocks?
granite, pumice, obsidian
what are metamorphic rocks made of?
heat pressure
what do metamorphic rocks look like?
sparkly, crystals, ribbon like layers
what are examples of metamorphic rock?
marble, slate, gneiss
what do sedimentary rocks look like?
sand grains, visible pebbles fossils may be visible
what are sedimentary rocks made of?
deposition, cementation
what are examples of sedimentary rocks?
conglomerate, sandstone, limestone, shale
characteristics of Earth:
third planet from the sun, densest planet, largest of the four terrestrial, only known object to harbor life
What does earth's tilt cause?
seasons
the _____ is the star at the center of the solar system and is earth's most important source of energy for life
sun
what is the solar system?
planetary system that orbits the sun, which includes 8 planets and their natural satellites, dwarf planets, asteroids, comets, & particles of smaller debris
what other planet is similar to earth in size, density, and mass?
Venus
what other planet is like earth in terms of rotation and tilt on it's axis?
mars
What is the order of the planets from the sun?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
how do you remember the order of the planets?
My Very Educated Mother Just Served Us Noodles
what are comets?
chunks of ice and rock originating outside of the solar system
what are asteriods?
chunks of rock and metal in orbit between mars and jupiter
What are meteorites?
small asteriods
what is light year?
a unit of astronomical distance equal to the distance light travels
If something is 4 light years away from earth how long will it take to be visible from earth?
4 years
what is speed of light?
300,000 km/s
what does earth's tilt cause?
the seasons
what happens when earth is tilted towards the sun?
it is warmer (summer)
what happens when earth is tilted away from the sun?
it is colder (winter)
characteristics of the fall & autumn equinox?
12 hrs of both daylight and darkness & september 23
characteristics of summer solstice
maximum tilt towards the sun causing the longest period of daylight & june 22
characteristics of the spring vernal equinox
12 hrs of both daylight and darkness & march 21
characteristics of winter solstice
north pole is tilted furthest away from the sun causing the shortest period of daylight & december 21
what marked the emergence of modern science and the heliocentric model regarding the universe?
scientific revolution
what theory was believed before the heliocentric theory?
geocentric theory
what is the geocentric theory?
that earth sat stationary at the center of the universe
what is the heliocentric theory and who introduced it?
Nicolaus Copernicus & the sun was at the center of the universe and earth rotates on its axis while revolving around the sun
what does the moon do?
affects the tides
what does a waxing moon look like?
illuminated on the right side
what does a waning moon look like?
illuminated on the left side
what are stars?
luminous balls of gas, mostly hydrogen, held together by its own gravity
what do star colors rely on?
temperature
what is the color of a hotter star?
blue
what is the color of a cooler star?
red
what are the types of stars?
O, B, A, F, G, K, M
what is the color and temperature of a O star?
blue, 25,000 kelvin
what is the color and temperature of a B star?
blue, 11,000-20,000 kelvin
what is the color and temperature of a A star?
blue, 7,500-11,000 kelvin
what is the color and temperature of a F star?
blue to white, 6,000-7,500 kelvin
what is the color and temperature of a G star?
white to yellow, 5,000-6,000 kelvin
what is the color and temperature of a K star?
orange to red, 3,500-5,000 kelvin
what is the color and temperature of a M star?
red, under 3,500 kelvin
What is a lunar eclipse?
the earth comes first created a shadow on the moon called the umbra
What is a solar eclipse?
the moon comes first
what is the space race?
when the US was competing with Russia to be the first to put a man on the moon & began in 1957 when Russia launched Sputnik, the first artificial satellite & then the US committed to getting to the moon before Russia
what are earth's patterns?
spins on its axis & makes one full revolution on its axis every 24 hours & revolves around the sun & 365 days to make one full revolution around the sun
what are earth's cycles?
these cause day, night, seasons, weather, phases of the moon, water cycle, and life cycle
what are earth's changes?
some changes happen quick some happen slow & -ex: north american and european tectonic plates are separated by the mid-Atlantic ridge, the two continents are moving away from each other at about 1 inch per year
what are earth's magnetic poles?
magnetic fields that extend from its interior to outer space
what is calibrated by the magnetic poles?
compass
What does the magnetic field do?
morph, push, and pull at one another
magnetic poles on earth
magnetic field S pole is earth's geographic north pole & magnetic field N pole is earth's geographic south pole
what is the continental drift?
earth's continents were once one big land mass that separated or drifted apart over time because of tectonic plates
what is the big landmass in the continental drift called?
Pangea
Who proposed continental drift?
Alfred Wegener in 1912
the practice of science should be outline in these skills (VERY IMPORTANT):
asking questions and defining problems developing and using models & analyzing and interpreting data & using math and comcuptational thinking & constructing explainations and designing solutions & obtaining, evaluating, and communicating information
what does science is inquiry based?
students must be given the opportunity to interact with the concepts they are studying
what is an example of inquiry based?
ex: stuyding living organisms & students need to observe living organisms and have the opportunity to touch, observe, and interact
what are living things?
have physical entities and biological processes such as homeostasis, cell division, cellular respiration, and photosynthesis
what three components make up cell theory?
all living things are composed of cells & all cells come from pre-exisiting cells & cell is the smallest unit of life
what is the organization of life?
cells, tissues, organs, organ systems, and organisms
what are the six different kingdoms?
Plantae, Animalia, Fungi, Protista, Eubacteria, Archaebacteria
What is a prokaryote?
unicellular organism that lacks a nucleus, mitochondria, or any other membrane bound organism
what is a eukaryote?
multicellular organism that contains a nucleus, mitochondria, and membrane based organelles
what does DNA do in the prokaryote cell?
floats freely throughout the cell
what two domains are prokaryote cells divided into?
archaea and bacteria
what are organelles?
the structure within the cell membrane or cell wall
what are the main structure of the organelles?
cellular membrane, nucleus, mitochondria, cytoplasm
what is cellular membrane?
fluid, permeable outside covering of the cell, in plant cell this is a cell wall and its rigid
what is nucleus?
command center of the cell, it controls the rest of the cell
what does DNA do in a eukaryote cell?
lives in the nucleus
What is the mitochondria?
powerhouse of the cell
what is cytoplasm?
water like substance in the cell
what kind of cell are bacteria and virus?
prokaryote
what kind of cell are animals and plants?
eukaryote
What process do animal cells go through?
cellular respiration, which is the process of taking in food in the form of carbohydrates which makes energy in the form of ATP and removing waste
What is the equation for cellular respiration?
Glucose (sugar) + Oxygen ---> Carbon Dioxide + water + energy (as ATP)
what process do plant cells go through?
photosynthesis which is the process of making their own food by using carbon dioxide, sunlight, and turning them into carbohydrates
What is the equation for photosynthesis?
Carbon dioxide + water + sunlight -----> glucose (sugar) + oxygen
what happens to the waste of animal cells?
it becomes nutrients plants use to go through photosythesis
what happens to the waste of plant cells?
it becomes nutrients for animals to use to go through cellular respiration
what kind of relationship do plants and animals have?
symbiotic relationship
plants have:
cell wall, chloroplasts, phtosythesis
animals have:
plasma membrane, no chloroplasts, cellular respiration
what are the 2 types of reproduction?
sexual and asexual
characteristics of sexual reproduction
2 parents, ech contribute a gamete (sex cells), male gamete: sperm, female gamete: ova (egg), occurs in both plants and animals
characteristics of asexual reproduction:
- involves 1 parent
what are the 4 types of asexual reproduction?
binary fission, budding, fragmentation, parthenogenesis
what is binary fission?
single parent cell doubles its DNA then divides into 2 cells, usually occurs in bacteria
what is budding?
small growth on the surface of parent breaks off to continue growing into adulthood, usually occurs in yeast & some animals
what is fragmentation?
piece of the organism breaks off and those pieces develop into new organism
what is parthenogenesis?
when an embryo develops on unfertilized cell, this occurs in invertebrates as well as some fish, amphibians, and reptiles
what are the benefits of sexual reproduction over asexual?
sexual offspring's are genetically different, genetic diversity has more advantages because it allows populations to adapt and evolve
what are the 4 phases of mitosis?
Interphase (not an actually phases but very important) prophase, metaphase, anaphase, telophase
what is interphase?
cell prepares for division, it pumps and replicates its DNA within the nucleus & DNA is uncoiled which is call chromatin & organelles double (structures within the cell membrane)
what is prophase?
DNA tightly coils into chromosomes to make splitting efficient & the nuclear membrane dissolves -the microtubes or spindle fibers attach to each chromosome
what is metaphase?
chromosomes (tightly coiled DNA) move to the middle of the cell & the spindle fibers attach to each chromosome
what is anaphase?
spindle fibers begin to pull apart the chromosomes & bringing them to opposite sides of the cell for efficient splitting
what is telophase?
with chromosomes at either side of the cell & two new cells pinch off forming two identical sister cells of the original cell
what else happens in telophase?
cytokinesis: when cell separate into two new cells during the final stage of mitosis
In sexual reproduction what happens during meiosis?
two step process that reduces the chromosome number by half, from 46 to 23 to form sperm and egg cells & -the sperm and egg cell each contribute 23 so the embryo will have 46
what is another name for down syndrome?
Trisomy 21
What causes down syndrome?
during cell division when the chromosomes spilt they did not spilt evenly
what does down syndrome mean for the cells in the body?
that each cell in the body has 3 copies of chromosome 21 instead of 2 copies
what is DNA?
hereditary material in living organisms
what are the four nitrogen bases in DNA?
adenine, guanine, cytosine, thymine
What are the pairs of nitrogen bases in DNA?
Adenine Thymine & Cytosine Guanine
what are amino acids?
organic compounds that combine to form proteins
what do these chains of amino acid do?
make protein that makes cell structures, cells, tissues, organs, organ systems, organisms
what is the process of DNA replication?
DNA unzips & free flowing nucleotides ( AT, GC) bind to the unzipped portion of the DNA & two identical DNA strands are the result
what acts as instructions to make molecules called proteins?
Genes
how many copies of genes does each person get and where does it come from?
the each get two genes and 1 inherited from each parent
what are alleles?
forms of the same gene with slight difference in the sequence of DNA bases
what is dominance?
when the effect of one phenotype of one allele masks the contribution of a second allele
what is an example of dominance?
brown eye color is dominat over blue eyes, for a person to have blue eyes they must have both recessive alleles
who is the father of genetics?
Gregor Mendel
What did Gregor Mendel discover and how?
coined the terms dominant and recessive traits through the experiment of pea plants
Who discovered chromosome theory and what is it?
Thomas Hunt Morgan & the idea that genes are located on chromosomes
What is metamorphosis?
process of transformation from immature form to be an adult form in 2 or more distinct stages
what are the two types of metamorphosis?
complete and incomplete
what is complete metamorphosis?
when insect goes through four stages: egg, larva, pupa, imago & ex: caterpillar to butterfly
what is incomplete metamorphosis?
insect hatches from the egg and then goes through several nymphal stages & ex: grasshopper gradually gets bigger but doesn't change into something else
What is evolution?
types of changes that happen over thousands of years
what is important to note about evolution?
organisms do not evolve, populations evolve through genetic mutations over lengthy periods of time
What is adaptation?
distribution of traits in a population that is matched to and can change with environment conditions
what is an example of adaptation?
frog inherited genetic variations that result in camouflage, allowing the frog to survive and reproduce
what is natural selection?
traits passed down by offspring that allow organisms to adapt to the environment better than other organisms of the same species
Who developed natural selection?
Charles Darwin and Alfred Russel Wallace
how do adaptation and natural selection play a role together?
the adaptations allow for genetic variations to give some members advantages in environment, but this genetic variation is often random which will lead to natural selection (survival of the fittest)
what are mutations?
changes in DNA caused by mistakes during cell division or exposure to environmental factors
what is the behavior of individual organisms influenced by?
internal cues (hunger and internal temperature) & external cues (changes in environment)
What is homeostasis?
tendency to maintain a stable, relatively constant internal environment
what is an example of homeostasis?
no matter how hot or cold it is outside the human body is able to maintain a temperature of 98.6
what are the types of organisms?
cold and warm blooded
What does cold-blooded mean?
body temperature varies with that of the environment
What does warm blooded mean?
maintain body temperature regardless of environment
what are some examples of cold blooded?
amphibians, reptiles, fish, insects
what are some examples of warm blooded?
mammals, birds
What does vertebrate mean ?
has a back bone
What does invertebrate mean?
doesn't have a back bone
which kingdom do both vertebrate and invertebrate come from?
Animalia