cumulative science

230 terms by yvette 

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protects the developing flower

what is the function of the sepals of a flower?

the colors and shapes of the petals attract insets and other animals. these organisms ensure that pollination occurs.

what is the function of the petals of a flower?

the male reproductive parts that help produce new flowers

what is the function of the stamens of a flower?

produces pollen

what is the function of the anthers of a flower?

the thin stalk that supports the anthers. it also gives nutrition to the anther

what is the function of the filaments of a flower?

sperm cells that help pollination occur.

what is the function of the pollen grains of a flower?

the female reproductive organ.

what is the function of the pistil of a flower?

the sticky tip of the pistil that attracts pollen.

what is the function of the stigma of a flower?

connects stigma to the ovary

what is the function of the style of a flower?

it protects seeds while they develope.

what is the function of the ovary of a flower?

a plant structure in seed plants that contains an egg cell.

what is the function of the ovules of a flower?

1) the angiosperm produces flowers. 2) inside the ovary, an egg cell is produced in each ovule of the pistil. the cells in the anther produce pollen grains. 3) the pollen grains are trapped in the stigme. 4) the pollen grains produce a pollen tube that grows into the ovule. a sperm cell moves through the pollen tube and joins with the egg cell. 5) the ovule develops into a seed. the ferilized egg becomes the seed's embryo. other parts of the ovule develop into the seed coat and the seed's stored food. 6) the ovary and other structures develop into a fruit that encloses the seeds. the fruit helps in seed dispersal. 7) a seed grows into a new plant.

what are the steps of an angiosperm life cycle?

an angiosperm that has two seed leaves. ex. violets, roses, dandelions, oak, maple trees... # of petals: a multiple of 5 and 4. shape of the leaves: wide with viens that branch. vascular tissue arrangement: in a circle.

what is a dicot? characteristics?

the waxy, waterproof layer that covers the leaves and stems of some plants.

define cuticle?

contain chloroplats that trap the energy in sunlight for photosynthesis

what is the function of the upper leaf cells in a leaf?

the many spaces between the lower leaf cells temporarily store carbon dioxide and oxygen.

what is the function of lower leaf cells in a leaf?

the vascular tissue through which nutrients and water absorbed by the plants flows from the roots up into the leaves and stems.

what is the function of xylem?

the food made during photosynthesis enters the phloem and travels from the leaves to the stems and roots.

what is the function of phloem?

the internal transporting tissue in some plants that is made up of a tubelike structure.

what is vascular tissue?

a fertilized egg produced by the joining of a sperm and egg cell.

what is a zygote?

the joining of a sperm cell and an egg cell.

what is fertilization?

the thin, root-like structure that anchors a moss and absorbs water and nutrients for the plant.

what is a rhizoid?

fern leaves. underneath the spores can be found.

what is a frond?

a seed leaf that stores food.

what is a cotyledon?

the plant structure that contains a young plant inside a protective covering.

what is a seed? (are you kidding me?!)

the outer covering of a seed.

what is a seed coat?

the process by which water evaporates from a plant's leaves.

what is transpiration?

the early growth stage of the enbryo.

what is germination?

the layer of cells in a plant that produces new phloem and xylem cells.

what is the cambium?

a plant that produces seeds that are not enclosed by a protective covering.

what is a gymnosperm? (remember, people tend to wear less clothing in GYMs)

a plant that produces seeds that are enclosed in a protective structure.

what is an angiosperm? (ANGles wear more clothing)

the growth response of a plant toward of away from a stimulus.

what is tropism?

the plant hormone that speeds up the rate growth of plant cells.

what is auxin?

1) obtainig water and nutrients from the soil. 2) retaining water with cuticles. 3) transporting water, food, and munerals using vascular tissue. 4) support and strength by vascular tissue. 5) reproduction.

what are 5 plant adaptations for living on land?

1) sporophyte 2) grow into gametophyte produce sperm/egg 3) fertilization. 4) zygote 5)embryo grows into sporophyte

what is the life cycle of moss?

tiny particles produced by plants that contain the microscopic cells that later become sperm cells.

what is pollen?

a plant structure in seed plants that contains an egg cell.

what is an ovule?

an angiosperm that has only one seed leaf. ex. corn, wheat, rice, lilies, tulips. # of petals: a multiple of 3. shape of leaves- parallel veins. vascular tissue arrangement: scattered randomly

what is a monocot? characteristics?

1) production of naked seeds 2) scale-like/needle-like leaves. 3) deep growing root systems.

what are 3 characteristcs of gymnosperms?

1) low growing. 2) have no vascular tissue. 3) obtain water and minerals directly from soil. 4) 3 types of nonvascular plants are liverworts, mosses, and hornworts. 5) no true roots, leaves and stems.

what are characteristics of nonvascular plants?

water, wind, animals (digestive system/sticking to fur)

3 methods of seed dispersal.

means an organism with cells that contain nuclei and other cell structures.

eukaryotes

means the process by which plants and some other organisms captures light energy and use it to make food from carbon dioxide adn water

photosynthesis

the process of grouping things based on their similarities.

classification

a branch of biology that classifies living organisms and names them.

taxonomy

the first scientist to classify organisms. a. he grouped animals according to their environment-land, water, air. b. today we use his method of "observationh" and creating subgroups.

aristotle.

called the founder of modern taxonomy. he divised a naming system called binomial nomenclature.

Linnaeus.

the naming system organized by Linnaeus. in this, each organism is given a two-part name.the first part being its genus, the second being its species. these two characteristics put together make up an organisms scientific name.

binomial nomenclature.

is a classification grouping that contains similar, closely related organisms. this is also the first part of an organism's scientific name.

genus

is a group of similar organisms that can mate and produce fertile offspring in nature. it is also the second part of an organism's scientific name.

species

is a series of paired statements that describe the physical characteristics of different organisms.

taxonomic key

is used to help classify organisms (biological classification)

taxonomic or dichotomous key.

means ancient bacteria

archaebacteria

they are unicellular and have no nucleus. this type of bacteria is found in yogurt. helps fight off bad bacteria.

eubacteria

are tiny organisms that are mostly unicellular. some examples are paramecium and ameba

protists

are mushrooms, mold, and mildew. they feed on dead or decaying organisms. they are decomposers.

fungi

they are multicellular and are able to make their own food (autotrophs)

plants

organisms in this group are more complex than plants. they are multicellular and are heterotrophs. this means they do not make their own food and rely on an outside food source.

animals

cells without a nucleus. ex. bacteria

prokaryotes

an organism that lives on or in another organism and causes harm

parasite

is the organism that the parasite lives and feeds on or in.

host

the round shaped type of virus. ex. staphylococcus aureus (strep throat)

spherical

is a long whip-like structure used for movement.

flagellum.

a poison that can harm an organism

toxin

is a reproductive process that involves only one parent and produces offspring that are identical to the parent.

asexual

a form of asexual reproduction. the cell first duplicates its genetic material and then divides into two separate cells. each new cell gets its own complete copy of the parent cell's genetic material as well as some of the parent's ribosomes and cytoplasm

binary fission

an illness that is passed from one organism to another

infectious disease

a chemical that kills bacteria without harming the cells of the host

antibiotic

where one bacterium transfers some of its genetic material into another bacterial cell through a thin, threadlike bridge that joins the two cells. after the transfer, the cells separate.it results in the production of new bacteria which are genetically different than the parent cells.

conjugation

small, nonliving particle that invades and then reproduces inside a living cell. it does not grow, isnt made up of cell(s). does not respond, cannot make food or take it in, and doesnt produce wastes. but it can reproduce and has DNA. it also acts like a parasite.

virus

requires oxygen to break down food and survive

aerobic respiration

a virus that infects bacteria that has a robot like shape.

bacteriophage

one billionth of a meter. viruses are measured using this unit of measure

nanometer

after entering a cell, an active virus immediately goes into action. the virus' genetic material takes over the cell's functions, and the cell quickly begins to produce the virus' proteins and genetic material. then these parts assemble into new viruses. like a photocopy machine left in the "on" position, the invaded cell makes copy after copy of new viruses. when it is full of new viruses, the host cell bursts open and releases the new viruses.

active viruses

the small, rounded, thick-walled, resting cell that forms inside a bacterial cell. it allows bacteria to survive harsh conditions (heat, freezing).

endospore

the genetic material of these viruses enters a host cell. then its genetic material becomes part of the cell's genetic material. the virus does not appear to affect the cell's functions. the virus' genetic material may stay in this state for a while. then, for reasons, that scientists do not yet fully understand, the virus' genetic material suddenly becomes active. it takes over the cell's functions like the active viruses do. in a short time, the cell is full of new viruses and it bursts open to release them. ex. cold sores.

hidden virus

eubacteria that live in soil break down dead organisms are called decomposers

decomposers

substance that stimulates the body to produce dhemicals that destroy viruses or bacteria. ec. polio, mumps, rubella, smallpox, measles, chicken pox, tetanus.

vaccine.

animal-like protists that use flagella to move. most of them have on to eight flagella. many of them live inside the bodies of other organisms. ex. intestines of termites. they digest the wood that the termites eat, producing sugars for themselves and for some termites.

zooflagellates

the small nucleus in ciliates that control reproduction

micronucleus

interaction between 2 species where at least one benefits.

symbiosis

a funnel-like indentation lined with cilia. the cilia move water containing food into the vacuole that forms at the end of the oral groove.

oral groove

ce on a layer of slime that it produces. most have more than one host. ex. malaria:two hosts are involved-humans and a species of mosquitoes. spreads when mosquito bites a person with malaria, infected+ bites a healthy person.

sporozoans

when both partners benefit from living together, the relationship is a type of symbiosis called mutualism

mutualism

spores produved in fruiting bodies/vary in appearance also called spore case

sporulation

small hair-like structures used for movement. it sweeps food particles into the oral groove and it senses the environment.

cilia

temporary bulges of the cell membrane that fill with cytoplasm. it means "false foot". they from when the cell membrane pushes outward in one location. it is used to engluf food particles through a process called phagocytosis.

psudopod

when diatoms die, their cell walls collect on the bottoms of oceans asnd lakes. over time, they form layers of a coarse material called diatomaceous earth. this makes a good polishing agent. ex. toothpastes, many household scouring products as well as in swimming pool filters, and insecticides.

diatomaceous earth

the large nucleus in ciliates that controls the cell's activitiews

macronucleus

the process where psuedopods engulf food particles

phagocytosis

branching, threadlike tubes. they are found in multicellular fungi and transport food, water, and minerals throughout the fungi.

hyphae

yeast cells use the sugar in things for food and produce carbon dioxide gas as they feed. the gas forms bubbles, which makes things like dough to rise. without it, bread would be flat and solid. it is also used in wine so alcohol and carbon dioxide can be produced.

yeast

small particles, like those of water, pass easily though the cell membrane into the cytoplasm so things like amebas have problems. if the excess water were to build up inside the cell, the ameba would burst. fortunately, amebas hlave a contractile vacuole, a structure that collects the extra water and then expels it from the cell.

contractile vacuole

unicellular yeast cells undergo a form of asexual reproduction called budding. in budding, no spores are produced. instead, a small yeast cell grows from the body of a large, well-fed parent cell in a way that might remind you of a bud forming on the branch of a tree. the new cell then breaks away and lives on its own.

budding

the most abundant substance in the body

water

the process by which your body breaks down food into small nutrient molecules

digestion

nutrients that are not made by living things are called minerals.

minerals

molecules that act as helpers in a variety of chemical reactions within the body.

vitamins

nutrients that contain nitrogen, as well as carbon, hydrogen, and oxygen are called proteins.

proteins.

like carbohydrates, fats are high-energy nutrients that are composed of carbon, oxygen and hydrogen.

fats

the substances in food that give the raw materials and the energy needed by the body are called nutrients

nutrients

a flap of tissue that seals off the windpipe, preventing food from entering it.

epiglottis

a muscular tube that connects the mouth to the stomach

esophagus

involuntary waves of muscle contraction that push food through the digestive system

peristalsis

the physical breakdown of food. ex. chewing

mechanical digestion

in chemical digestion, chemicals produced by the body break foods into their smaller chemical building blocks.

chemical digestion

the tiny finger shaped structures that cover the inner surface of the small intestine are called villi. nutrient molecules pass from the small intestine into the bloodstream through the villi.

villi

is the last section of the digestive system. it is about one and a half meters long. it runs up the right-hand side of the abdomen, across the upper abdomen, and then down the left-hand side. the large intestine contains bacteria that feed on the material passing through.

large intestine

almost all chemical digestion and absorption of nutrients takes place in the small intestine. it is 6 meters long, it makes up 2/3 of the digestive system

small intestine

is one whose trait always shows up in an organism when the allele is present.

dominant allele

is one whose trait is hidden or masked when a dominant allele is present.

recessive allele

is when an organism always produces an offspring with the same trait as the parent. ex. short plants produce shor offspring/tall plants produce tall offspring.

purebred

different forms of a gene. individual alleles control the inheritance of traits from each parent.

alleles

an organism that has 2 differnt alleles for a trait (heterozygous)

hybrid

characteristics that an organism can pass on to an offspring

traits

the passing of traits from parent to offspring

heredity

the scientific study of heredity

genetics

is the likelihood that a partifular event will occur, not necessarily what will occur. ex. coin toss-heads or tails are the possible outcomes. 1 in 2 probability. **the more tosses you make, the closer your actual results will be to the prdicted results of the prbability. the results of one toss do not affect the results of the next toss.

probability

is a chart that shows all the possible combinations of alleles that can result from a genetic cross

punnett square

is its physical appearance or its visible traits. ex short or tall.

phenotype

is its genetic makeup or its allele combination. ex. Tall- pure tall=TT. hybrid tall (hides the recessive trait)=Tt

genotype

means that an organism has 2 identical alleles for a trait. ex. pure for a trait=>TT or tt

homozygous

means that an organism has 2 different alleles for a trait. hybrid=Tt

heterozygous

alleles are neither dominant or recessive. both traits appear in the offspring. ex. erminette chickens-black and white feather alleles are codominant. both colored feathers are present.

codominance.

to take in food

ingestion

removal of indigestible material

egestion

the break down and absorption of food nutrients

digestion

the absorption and distribution of materials throughtout an organism

transport

cellular respiration that requires oxygen is called aerobic

aerobic respiration

cellular respiration that does not require oxygen is called anaerobic

anaerobic respiration

removal of waste products from chemical reactions is called excretion.

excretion

chemical reactions that combine small molecules to form larger molecules

synthesis

the ability of an organism to respond to chances in its surrounding is regulation

regulation

an organism's cell increases in cize or total number of cells through growth

growth

the process to produce offspring that are similar to the parents is reproduction

reproduction

an organisms cells use energu to do their jobs. ex grow, repair injured parts, to digest foods

cell's energy use

all cells of living things are made up of chemicals- water (most abundant chemical), carbohydrates (source of energy), proteins and lipids (are the building blocks), and nucleic acids (generic material in DNA)

chemicals of life.

means that all organisms are made of small building blocks called cells. cell: is a basic unit of stucture and funtion in an organism. unicellular: is made up only one cell. multicellular: made of many cells.

cellular organization

stimulus-a change in surroundings that causes a reaction. ex. change in temperatures. responce-is the reaction to a stumulus. ex: you jump when scared.

response to surroundings

protects the cell and regulates what substances enter the cell. included in the plant and animal cell.

cell membrane

surrounds th4e cell membrane, giving it a box-like shape. made of cellulose. included in the plant cell

cell wall.

produces most of the cell's energy. "power house" included in the plant and animal cell

mitochondria

recieve materials from the endoplasmic reticulum and send them to other parts of the cell. they also release materials outside the cell. included in the animal and plant cell

golgi body

capture energy from sunlight and use it to produce food. "contain clorophil" included in the plant cell

cloroplast

produce proteins, they may be attached to the outer surfaces of the endoplasmic reticulum or they may float free in the cytoplasm. included in the plant and animal cell

ribosome

carries materials from one part of the cell to another. included in the plant and animal cell

endoplasmic reticulum

contain chemicals that break down food particles and worn-out cell parts. included in the animal cell.

lysosome

carries genetic imformation that controls inherited characteristics such as eye color and blood type. included in the animal cell.

chromosome

directs all of the cell's activities, incluing reproduction. "brain of cell or control center" found in the plant and animal cell.

nucleus

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