Cell : the unit of life Flashcards
(21 cards)
what is reductionist biology?
the physico-chemical approach to study living organism is called reductionist biology
who is the father of zoology, biology, and modern embryology?
aristotle
father of botany?
theophrastus
what is a cell?
it is a structural and functional unit of life
what is the defining feature of all living organism?
cellular organisation
with the advancement in electron microscope, what were the minute details of cell where seen?
riboosome, ER, and cell memb
who discovered cell for the first time?
robert hooke (1665), dead, oak plant
robert hooke discussed about cell in his book called
miocrographia
who discovered living cell for the first time?
anton von leeunhoek
who discovered nucleus?
robert brown (1831)
examples of unicellular organisms?
bacter, bga, protista, yeast, chalmydomonas
protista are unicellular eukaryotes
examples of multicellular organisms?
most fungi (except yeast),
most plants (except chlamydomanas)
all animals
speciality of unicellular organisms?
- can live independently
- all essential functions are performed by single cell only
cell theory was given by ?
schleiden
schwann
cell theory given by schledien was?
Schleiden was a german botanist, 1838
“different plants are made of differen types of cells that makes diff. tissues.”
cell theory given by schwann was?
schwann was german zoologist, 1839
he observed animal cells and observesd a thin layer on all animal cells which is now called as cell membrane/plasma membrane.
in plants, he found that plant cells have one more layer outer to cell membrane called cell wall.
what was the exception to cell theory?
virus (bcoz it do not have its own cell)
what is cell theory?
according to cell theory all organisms are made up of cells and product of cells
drawback of cell theory?
cant explain the origini of new cells.
who modified the cell theory?
rudolf virchow, 1855, said omni cellula e cellula
