Studied by 14 people
Abiogenesis
life could arise from non-living or once living things.
Biogenesis
The idea that life arises from life.
Paradigm Shift
an important change that happens when the usual way of thinking about or doing something is replaced by a new and different way.
Francesco Redi
Conducted one of the first controlled experiments that supported biogenesis. Worked/used meat in jars, some covered/some not. Made observations regarding whether or not maggots would develop.
Louis Pasteur
He conducted experiments that finally disproving abiogenesis. He used flasks with S-shaped necks to show that microorganisms come from other microorganisms, and do not appear by spontaneous generation.
The Four Points of the Cell Theory
All organisms are made of one or more cells 2. Cells are the basic units of structure and function in all organisms 3. All cells come from other, already existing cells 4. The activities of a multicellular organism depend on the activities of all of its cells
Magnification
Refers to the number of times larger the image you observe is compared with the actual object.
Resolution
Refers to the ability of the microscope to show details at a given magnification.
Depth of Field
Refers to the range that is in focus from foreground to background.
Prokaryote
Lack a nucleus, Smallest living cells, Simple internal structure, lack membrane-bound organelles, All bacteria cells are prokaryotic.
Eukaryotic
Have a nucleus, Larger cells compared to prokaryotic because they have complex internal structure, have membrane-bound organelles, Organelles work together to carry out cellular functions, All life that isn’t bacteria are made of eukaryotic cells. Explain the difference between biogenesis and abiogenesis
Robert Hooke
Used a compound microscope to observe slices of cork
Observed empty vessels he called “cells”
Anton Von Leeuwenhoek
First to make and use a microscope
Observed microorganisms (bacteria)
Types of Microscopes
Simple microscope, Compound Light Microscope, and Electron Microscope.
Nuclear Membrane
Holds nucleus together
Endoplasmic Reticulum
Surface for chemical activity
Chromosomes
Units of heredity
Lysosomes
Digestion centres
Ribosomes
Where proteins are made
Microtubule
Microscopic cylinders that support and give the cell shape
Cell wall
Shapes and supports a plant cell
Golgi Body
Stores and releases chemicals
Chloroplasts
Food for plant cells Is made here
Nucleolus
Spherical body within nucleus
Cell Membrane
Controls entry into and out of cell
Chlorophyll
Traps light and is used to produce food for plants
Nucleus
Chromosomes are found here -
Cytoplasm
Jellylike substance within cell
Nuclear Pore
Minute hole in nuclear membrane
Mitochondria
"Powerhouse" of cell
Vacuole
Contains water and dissolved minerals
Plastid
Stores food or contains pigment
Cell Membrane
Controls the movement Into and out of the cell
Cytoplasm
Watery material which contains many of the materials involved in cell metabolism
Endoplasmic Reticulum
Serves as a pathway for the transport. of materials throughout the cell; also associated with synthesis and storage
Nucleus
Serves as the control center for cell metabolism and reproduction
Ribosomes
Sites of protein synthesis
Mitochondria
The 'powerhouse" of the cell
Golgi Body
Packages and secretes the products of the cell
Vacuole
Fluid filled organelles enclosed by a membrane; contains stored food or wastes.
Rough Endoplasmic Reticulum
Site of the production of ribosomes
Nuclear Membrane
Controls movement into and out of the nucleus
Cell Wall
Gives the cell its shape and provides protection; not found in animal cells
Cilia
Hairlike structures with the capacity for movement
Flagella
A long hairlike structure used for movement
Chloroplasts
Site of photosynthesis
