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What is science and what are 3 examples?
the study of nature.
define technology and give 3 examples of the products of the technology
- developing of useful tools.
- cars, computers, tv
why are rober hooke and robet brown famous in bio history
- hooke: cell
- brown: nucleus
give 2 major accomplishments of Anton Leeuwenhoek
made better microscope. good drawer of allge
how are a simple and compund microscope diff and wit is the max magnification for compund light microscope
- simple: 1 lense
- compound: 2 lense?
- magnigication: 2000x
what is the diff in the image produced by a TEm and a SEM and wut r 3 objects that require an electron microscope to see
- TEM: 3D image
- Viruses, organelles, ribosomes
name 2 organelles that animal cells have that plant cells dont and 3 organelles that plant cells have but animal cells dont
- animals: lysomes, centiels
- plants: cell wall, chloroplast
describe the structure and function of the cell membrane, the nucleus and the cytoplasm
cell membrane: double layer of fat (phospholipid) with proteins. forms a barrier; controls what enters and leaves the cell.
nucleus: spherical; it is made of DNA and proteins (holes in membrane). DNA in nucleus controls protein synthesis thus controlling all cell activites.
cytoplasm: is cell liquid (water and proteins). cyto plasm has organelles in it; it is the place where many cell reactions occur