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Bio 7.1-7.4 test
| Question | Answer |
|---|---|
| asexual reproduction | one parent |
| sexual reprosuction | two parents |
| what are two reasons that cells divide to make new cells | -growth n repair |
| how does cell division relate to wounds | new cell production |
| true or false Organisms grow larger when their cells grow larger | false |
| where do all the cells on your body originate from | single fertilized egg cell |
| what is the difference between parents in asexual and sexual reproduction | A- just one parent S- two parents |
| what's the dfference in the offspring of asexual and sexual | asexual gets everything from one parents while sexual reproduction splits it between two |
| chromotin | combination os DNA and protein molecules |
| chromosome | divided chromatin fibers |
| sister chromatids | two identical joined copies |
| centromere | region where two chromatids are joined together tightyly |
| mitosis | nucleus and chromosomes divide |
| Cytokinesis | cytoplasm divides into two usually begins before mitosis is completed |
| where is the genetics information in eukaryotic cells found | the nucleus |
| how many chromosomes do humans have | 46 |
| how many chromosomes pairs do humans have | 23 |
| what does cell have to do before it divides | duplicate all of its chromosomes |
| what happens during interphase | a cell carries out its metabolic processes and performs its functions |
| what happens during G1 phase | major cell growth builds larger amounts of protein |
| what happens in G2 stage | Rapid growth, enzymes that are needed are produced |
| what happens in S stage | DNA is copied |
| what's the difference between mitosis and cytokinesis | mitosis= nucleus and chromosomes divide cytokinesis= cytoplasm splits into two |
| spindle | football shaped framework of microtubules |
| centrosome | spindles grow from centrosome- regions of cytoplasmic material that in animal cells contain structures called centriols |
| cleavage furrow | pinching the cell into two |
| cell plate | eventually forming into cell wall |
| what phase before mitosis begins, what is important events happening during this phase | interphase- makes new molecules |
| list the four stages of mitosis | prophase, metaphase, ana phase, telophase |
| what happens during prophase | chromatin condenses |
| what happens during metaphase | chromosomes line up along the middle of the cell spindle is fully formed |
| what happens during anaphase | sister chromatids seperate |
| what happens during telophase | chromosome reach poles reverse of prophase |
| what happens during cytokinesis | cytoplasm is divided and 2 daughter cells are formed |
| how does cyto kinesis differ in plant cells and animal cells | Animal= cleavage furrow plant= cell plate |
| benign tumor | abnormal mass of cells |
| malignant tumor | masses of cells that result from production of cancer cells |
| cancer | a disease caused severe disruption of the mechanisms that normally control cell cycle |
| metastisis | spread of cancer cells beyond the original site |
| radiation therapy | disrupts cell division exposed to high levels of radiation |
| chemotherapy | treating patient with drugs to disrupt cell division |
| out of control cell reproduction can produce a mass cells called a .. | tumor |
| what's the difference between benign and malignant tumor | B- usually removable M- cant usually be removed |
| what are some methods to treat cancer | radiation and chemo |
Created by:
nat..moore15