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GrassauSTRBscience
8th grade life science STRB
| Question | Answer |
|---|---|
| What % of our body is made up of water? | 70% |
| What are the 4 basic needs of every living thing? | Water, Air,Food,and a place to live |
| What are the 6 characteristics of every living thing? | They: are made up of cells, sense and respond to change, reproduce, have DNA, use energy, and they grow and develop. |
| homeostasis | The maintenance of a constant internal state in a changing enviorment |
| What is the difference between sexual and asexual reproduction? | Asexual reproduction is when a parent makes a copy of itself to reproduce. Sexual reproduction is when two organisms exchange sex cells and their offspring has some traits from each parent. |
| What are the 6 elements that are key to life? | Carbon, hydrogen, nitrogen, oxygon, sulfur, and phosphurous |
| What are lipids used for? | lipids are used to store energy and are the foundations of membranes. |
| What makes a phospholipid | the combination of phosphurous and a lipid. |
| What are proteins made up of? | amino acids |
| What are proteins used for? | to provide cell structure and components of enzymes |
| cell | the smallest unit that can perform all life processes |
| stimulus | anything that causes a reaction or change in an organism |
| Sexual reproduction | Reproduction in which the sex cells from 2 parents unite producing offspring |
| Asexual reproduction | reproduction that doesn't involve the union of sex cells |
| heredity | the passing of genes from parent to offsping |
| metabolism | the sum of all chemical processes that occur in an organism |
| producer | an organism that produces its own food using its surroundings |
| consumer | an organism that eats other organisms |
| decomposer | an organism that gets energy by breaking down the remains of a dead organism |
| protein | molecule made of amino acids needed to replenish muscle |
| carbonhydrate | a class of energy giving nutrients |
| lipid | a type of biochemical that doesn't mix with water |
| Phospholipid | a lipid that contains phosphorous |
| ATP | adenosine triphosphate, main energy source for cells |
| nucliec acid | A molecule made up of subunits called nucleotides |
| What has the directions for using proteins? | DNA |
| What is called "the blueprints of life"? | Nucleic Acids |
| What is the difference between growth and development? | the difference between growth and development is that growth is just you growing in size and development is a change in form. |
| What does DNA stand for? | Deoxyribonuclic acid |
| Why do we need air? | We need air to release the energy from food. |
| What are the tiny round organelles made of protein and other materials? | ribosomes |
| What is the fluid inside a cell? | cytoplasm |
| What is the reason most cells are limited to a very small size? | surface area-to-volume ratio |
| What is a protective layer that covers the cell's surface and acts as a barrier? | cell membrane |
| What are small bodies in a cell's cytoplasm that are specialized to perform specific functions? | organelle |
| in a eukaryotic cell, an organism that contains the cell's DNA and that has a role in growth, metabolism, and reproduction | Nucleus |
| an organism that consists of a single cell that doesn't have a nucleus or membrane bound organelles | prokaryote |
| prokaryotes that are the smallest cells that have ribosomes | eubacteria |
| the entire genitc make up of an organelle | genotype |
| an organisms appearence | phenotype |
| wHAT IS USED TO organize all possible offspring fROM PARticular PaRENTS? | A PUNnett squARE |
| What are instructions for an inherited trait called? | genes |
| What is an alternative form of a gene | an allele |
| Why were pea plants a good choice for Mandel? | They grow quickly, are truebreeding, self-polinating, and cross-polinating |
| What is heredity | The passing of traits from parents to offspring |
| Dominant trait | shows up in first generation |
| recessive trait | shows up in 2nd generation |
| probability | the likelyhood that something will or will not happen |
| meiosis | copying process that produces cells with half the # of usual chromosomes |
| sex chromosome | one of the pair of chromosomes that determines the sex of an indivdual |
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huskerskickbutt
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