Cell theory quiz 2? Flashcards
who was schleiden
a botanist (1804- 1881)
who was schwann
zoologist (1810- 1882)
Discovery 1
all living things were composed of cells
discovery 2
all cells are similar in structure and function
(how they are made, what they do)
ex: mitochondria in a plant or animal is involved in energy etc. and will look the same
discovery 3
all cells come from pre-existing cells
- Virchow and biogenisis
discovery 4
the structure and function of an organism involves the organization and action of its cells
- ex: eagles team depends on players to work together
- the organism is the result of its cells
exception 1
- viruses
- - cannot be seen except w/ an electron microscope @ 500,000x
exception 2
- cell parts that reproduce
- mitochondria + chloroplasts passes their own DNA
what did lynn margulis do?
said they were eaten by bigger cells, cant get out now.
- Endosymbiosis theory
exception 3
not all cells are separated by a membrane
ex: muscle cells
would be restricted by a membrane
who coined the term cell
robert hook
why did the term cell make sense
because the little boxes were empty in the cork < plant (dead)
who discovered cytoplasm
Du Jardin
who discovered the nucleus
Robert brown
what material is cytoplasm
clear jelly like material
what makes up cytoplasm
h2o, some waste and some nutrients
where is cytoplasm located?
inside the cell membrane
what purpose does the cytoplasm serve
keeps the cells hydrated
what is the nucleus nickname?
the control center
what does the nucleus control
everything in the cell
what is inside the nucleus
dna
what is the structure of the nucleus
double membrane with pores
what does the double membrane do for the nucleus
provides protection
semi permeable
what is the shape of the nucleus
the shape of its cell
