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science
| Question | Answer |
|---|---|
| what is the difference between spontaneous generation and Biogenisis? | spontaneous generation-living comes from non living biogenisis-living comes from living. |
| what is the definition of a cell? | membrane covered structure that contains all the material needed for life. |
| whats the difference between unicellular and multicellular? | unicellular is when something is made up of one cell. multi cellular is when something is made of more then one cell(we are multi cellular). |
| what is the definition of a stimulus? | a change in an organisms environment that effects its activity. |
| what are some examples of a stimulus? | food,touch,darkness,light,temperature,noise,smell,taste. |
| whats the difference between sexual and asexual? | sexual has 2 parents(mixed DNA) asexual has 1 parent(complete clone/copy). |
| what the definition in homeostasis? | having and keeping a stable internal environment. |
| what are the necessities of life? | food, needed for energy, cell repair and to make more cells. water and oxygen, for reaction in the cells, and space |
| explain the Linnaeus classification system and in what order? | Kingdom, Phylum, class, order, family, genus,specious. |
| what is the definition of binomial nomenclature? | 2 word naming system, uses scientific names genus and species. |
| explain a Dichotomous key? | detailed list of identifying characteristics that include the scientific name. |
| how is a dichotomous key formatted? | two descriptive choices at each step |
| define a mitochondria | brakes down glucose and turns it into energy. some have Cristina which gives the mitochondria more surface area to have more glucose to make more energy. active tissues/organs like muscle tissue have more mitochondria |
| define a cell wall | its found in only plant cells, its made from cellulose. |
| define a vacuoles | sack that contains water, waste material,food makes up most of cells volume. |
| whats the shape of a plant cell | square |
| what is the shape of a animal cell | round |
| how are cells organised from smallest to largest | cell,tissue, organ, organ system, organism. |
| how did Hooke and Van Leeuwenhoek's contribute to cell studies. | Hooke found the first dead cell in a cork and Van Leeuwenhoek studied cells in pond water. |
| explain all 3 parts about the cell theory | all organisms are made up of one or more cells, the cell is the basic unit of life in all living things. all cells come from other cells. |
| explain how the size of the cell limits how bit a cell can grow.(hint volume surface area.) | cells cannot be large because it will not have enough surface area to gain nutrients or to get rid of of waste. |
| whats the difference between prokaryotic and eukaryotic cells | eukaryotic cells have a nucleus and prokaryotic cells do not have a nucleus |
| explain cell membrane? | a shell type structure that encloses a cell and allows certain things to go in and out of a cell |
| explain cytoplasm | a jelly like substance in a cell that hold all organelles in place. |
| explain ribosomes? | the smallest and most abundant organelles in a cell where amino acids hook together to make protein. |
| explain endoplasm reticulum what are there jobs | sacks and tunnels of membranes that carry substances to outside the cell. (rough has ribosomes attached transports protein.) |
| explain are Golgi bodies | flattened stacked membranes, changes lipids and proteins, pinches them off into sacks(vesicles) and ships them out of the cell(helps create lysosomes |
| explain nucleus and nucleolus | the nucleus is the largest organelle stores DNA. nucleolus is inside of the nucleus, and stores materials used to make ribosomes |
| what is DNA | deoxyribonucleic acid, contains all the information to tell the organelles and the cell what to do. |
| what is the relationship between Golgi bodies and vesicles | Golgi bodies store lipids and proteins into vesicles to be send to the outside of the cell. |
| what are vacuoles 2p | sack that contains water waste material and food, makes up for most of the cells volume. |
| explain lysosomes 2p | contains digestive enzymes, breaks down old cells and bacteria. |
| explain chloroplasts. what is the relation between chloroplasts and mitochondria | chloroplast contains chlorophyll-green pigment. chlorophyll absorbs sunlight where photosynthesis occurs and glucose(sugar) is made. the mitochondria breaks down glucose and turns it into energy. |
| explain the importance of the mitochondria , and why is cristae important | turns glucose to energy. activates tissues and organs like muscle tissue have more mitochondria. cristae adds surface area to the mitochondria which allows it to carry more glucose at a time. allowing it to produce more energy at a time. |
| what type of cell contains cell walls and why are are they important | plant cells, they are important because i helps the plant stay stiff and upright. |
| define magnification | how much larger a specimen is when using a microscope |
| what are the three types of microscopes list them in order of magnification from least to greatest | light microscope, scanning electron microscope, transmission electron microscope |
| define the three types of microscopes p1: light microscopes | light microscope: most schools use them, uses compound lenses and light to magnify objects, the lenses bend and refract light, object beneath appears closer. Scanning electron microscope: |
| define the three types of microscopes p2: scanning electron microscopes. | scanning electron microscope: allows scientists to view a universe too small to be seen with a light microscope. SEMs do not use light waves; they use electrons(negatively charged electrical particles) to magnify objects up to two million times. |
| define the three types of microscopes p3: transition electron microscopes. | transition electron microscopes: also uses electrons, but instead of scanning the surface(as with SEM's) electrons are passed through very thin specimens. |
Created by:
23rbright
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