CELL THEORY Flashcards
WHAT IS CELL?
considered as the main building blocks of all organisms
What are the different levels of organizations?
Cell-Tissues-Organ-Organ System-Organisms
Who coined the term cell ? The cork looked as if it was made of tiny pores, which he came to call “cells” because they reminded him of the cells in a monastery.
Robert Hooke
He observed RBC and discovered animal cell “animalcules”- tiny living organisms and discover bacteria and protozoa
Anton Van Leeuwenhook
Who is Robert Brown?
He discovered nucleus
He is a botanist thatconcluded that all plants are made up of cells.
Matthias Schleiden
Who is Theodor Schwann?
He is a zoologist that concluded that all animals are made up of cell.
He said that All cells arise from pre-existing cells.
Rudolph Virchow
What is the cell theory?
The cell is the basic unit of all living organisms.
All organisms are made up of cell.
Cells came from pre-existing cells.
What is order?
highly organize and coordinate structure
Ex.Single celled organism -organelles-molecules- atom
What is Sensitivity or Respond to Stimuli
Response to an action or event,diverse stimuli
What is phototropism and hydrotropism? Chemotoxis and phototaxis?
Chemotoxis -away form chemical
Phototaxis -away from light
Phototropism is light
Hydrotropism is water
What is Reproduction and it’s example?
Single celled organism reproduce by duplicating their DNA
Increase in number
Ex: 37.2 Cells in our body and
50 billions die daily -Apoptosis
Use to form new individual?
Multicellular organisms– produced germline cell —to rise gametes to form individual
What is the properties of life where it is a increase in size?
Growth and development -
Organisms grow and developing following specific instructions by their genres-
Ex: metamorphosis
