Exocrine Pancreatic & Palisade Mesophyll Cells Exocrine gland cells of the pancreas The pancreas contains two types of gland cells: endocrine and exocrine cells The?function?of the?exocrine gla...
Eukaryotic Cell Structure Compartmentalized cell structure Eukaryotic cells have a more?complex ultrastructure?than prokaryotic cells The cytoplasm of eukaryotic cells is divided up into?membrane-b...
Prokaryotic Cell Structure The cell structure of organisms determines whether they are?prokaryotic?or?eukaryotic Prokaryotes have the?simplest cell structure, being the first organisms to evolve on...
Endosymbiotic Theory Endosymbiosis Endosymbiosis is where one organism lives within another If the relationship is?beneficial?to both organisms the engulfed organism is not digested For endosymbios...
Spontaneous Generation Pre-existing cells In 1852 Robert Remak made the conclusion that cells divided to form new cells, that is cells came from?pre-existing cells His conclusion was reached after ...
Practical 1: Using a Microscope Many biological structures are too small to be seen by the naked eye Optical (light) microscopes are an invaluable tool for scientists as they allow for tissues, cel...
Stem Cells A?stem cell?is a cell that can?divide?(by mitosis) an?unlimited number of times Each new cell (produced when a stem cell divides) has the potential to?remain a stem cell?or to develop in...
Emergent Properties Multicellular organisms are able to undertake functions that unicellular organisms cannot, e.g. move over vast distances and digest large macromolecules This is a result of prop...
Surface Area to Volume Ratio For cells to survive, metabolic reactions must be occurring, these reactions depend on: Materials?constantly being?exchanged?across the?plasma membrane The?volume/mass?...
