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Biology 2
Test 2
Term | Definition |
---|---|
Prophase | visible chromosomes nuclear membrane dissolvse, spindle fibers appear |
metaphase | chromosomes align along the equator of the cell |
anaphase | chromosomes are pulled away or to opposite ends of the cell |
telophase | nuclear membrane reforms |
cytokensis | occurs cytoplasmic division resulting in two new cells |
meiosis | the cell division that produces gametes with half the number of chromosomes |
haploid | contain half the number of chromosomes |
diploid | contain the normal number of chromosomes |
somatic cells | body cells |
crossing over | prophase 1 chromoses cross over and exchange information this results in randomized traits |
ribosomes | potein production |
proteins | enzymes structual proteins, hormones |
mitosis | repair, replace and growth |
interphase | cells spend about 90 percent of their life in interphase replicated dna 2 complete sets of chromosomes that must be distributed equally |
prokaryote | doesnt have a nucleus |
eukaryote | has a nucleus |
3 main jobs of cells | 1. make energy 2. make proteins 3. make more cells |
cell membrane | contols what enters and leaves the cell, signals from other cells phospholopd bilayer |
cytoplasm | holds organelles in place |
vacuole and vesticle | storage and transports |
lysosomes | recycle and clean up, digest |