Multicellular organism
* All multicellular organisms have unicellular ancestors somewhere in their evolutionary past.
* Every multicellular organism begins life as a single cell
  - produces hormones
* Many multicellular organisms consist of several organ systems, which coordinate to allow for life
  - have specialized structures to support the transport of materials
* Most multicellular organism produces anisogametes.
* Most multicellular organisms become more complex as they grow
  - begin life as a single cell
  - display some form of symmetry
* Most multicellular organisms have complicated structures
  - many more genes than unicellular species
  - several chromosomes, which together comprise the genome
  - shapes
  - specialized cells for nutrient uptake and transport
  - types
  - live in water
  - reproduce sexually by combining an egg with either a sperm or pollen
  - undergo sexual reproduction
* Some multicellular organisms can live to be very old.
* Some multicellular organisms have copies
  - only a few cells
  - use types
* add more and more cells to form more tissues and organs as they grow.
* appear to have arisen from unicells numerous times.
* are able to protect themselves better against predators
  - specialize cells to perform specific functions
  - almost always larger
  - bigger and have more organelles
  - complex organisms that made upof many cells
* are composed of many cells that are specialized to do certain tasks
  - integrate their activities
  - cells, while unicellular are of one cell
  - specializedcells
  - constructed from many types of specialized cells
  - made from many cells
* are made up of more than one cell
  - two or more cells
  - naturally larger and more complex than unicellular organisms
  - recent invention in evolution
  - somewhat similar, but take a different path
  - typically larger and require specialized organ systems
  - usually more complex, and usually larger
* can be much larger and more complex
  - include both diploid and haploid eukaryotic cells
  - simultaneously partition complementary tasks among different cells
* consist of eukaryotic cells.
* contain a vast array of highly specialized cells
  - wide range of different cells
  - million and even trillions of cells
* create complex patterned structures from identical, unreliable components.
* depend on mitosis for growth and repair.
* do the same thing.
* eliminate the unnecessary.
* exhibit a complex process in obtaining their nourishment
  - much greater specialization
* grow as the number of their cells increase s
  - by increasing the number of cells
* has chloroplasts in the cell structure.
* have a great capacity to survive than unicellular organisms
  - series of organs and organ systems that function in homeostasis
  - set of cells that specialize in reproduction
  - different types of cells
  - division of labour
  - levels of organization
* have many cells that perform different tasks within the same body
  - tissues made of specialized cells
* performs one job, while a cell in a unicellular organism performs all jobs.
* possess diverse cell types that are organized in particular patterns.
* release signaling molecules that target other cells.
* require mechanisms for intercellular communication and adhesion.
* show emergent properties.
* undergo reproduction
* use methods
  - mitosis to grow and to replace worn-out cells
  - more complex methods
* utilize more complex excretory methods.
* vary greatly in size and complexity.
+ Cell, Kinds of eukaryotic organisms, Multicellular
  * Multicellular organisms are made from many cells. They are complex organisms. This can be a small number of cells, or millions of cells. All plants and animals are multicellular organisms. The cells of a multicellular organism are not all the same. They have different shapes and sizes, and do different work in the organism.
+ Excretion: Physiology
  * In single-celled organisms, waste products are discharged directly through the surface of the cell. Multicellular organisms use more complex methods. Higher plants eliminate gases through the stomata on the surface of leaves. Animals have special excretory organs.
+ Hormone: Endocrinology
  * Every multicellular organism produces hormones. The cells that react to a given hormone have special receptors for that hormone. When a hormone attaches to the receptor protein a mechanism for signalling is activated.
  * Multicellular organisms have a set of cells that specialize in reproduction. Reproduction in such organisms is usually sexual. If they are sperm cells, the organism is male, if they are egg cells it is female. If both are present, the organism is a hermaphrodite.