they all reproduce, eat, excrete etc i.e. they all have the characteristics of living things
Animals (the animal kingdom), by definition, are multicellular and heterotrophic. Animals cannot produce their own food. They feed on other organismal sources for their energy. They feed on plants or other animals. Thus be their definition of heterotrophic. All animals (whether Chordata, Echinodermata, Porifera, Placozoa, Annelida or Arthropoda) are all heterotrophic and all multicellular. Even tiny things like placozoans and rotifers are multicelled.Fungi cannot produce their own food either. Thus they may be called heterotrophic. They acquire their food by growing in it. Thus they acquire the label saprophytic as well. The fungal kingdom features both unicellular and multicellular organisms. Toadstools, mushrooms, bread mould, fruit mould and such are those that are multicellular.
All animals are heterotrophs, getting their organic molecules (food, growth) from another organism. Those that consume other organisms are predators. The larger predatory animals that consume smaller animals are carnivores (meat eaters).
A cladogram will show the genus and family of organisms and the offshoots of these said organisms including those that no longer exist in the present day.
When the immediate environment changes and stress is put on organisms. Then those who have the variation that will become beneficial in this environment will be reproductively more successful.
The individual, or the genes of the individual. All organisms are variants in phenotype and behavior. So, natural selection is the immediate environment these organisms are in and those that survive and reproduce better in this environment leave more descendants which carry the genes that promoted that survival and reproduction advantage. Then those genes are more represented in the populations gene pool and this is evolution.
Multicellular organisms have many specialized types of tissue, skin being one of those.
Cell specialization is necessary to support multicellular life because multicellular organisms need different tissues. This means it needs cells to make up those tissues and perform different functions.
A bird has to have feathers, hollow bones, and be warm-blooded. So if a bird has those characteristics it is a bird.Lay eggs and birds are Vertebrates.
Any animal or plant large enough to be seem without a microscope are some that are smaller are multicellular. All insects, mammals reptiles, amphibians, fish, crustaceans, trees, flowers, and bushes are multicellular. From apple trees and ants to zebras and zinnias.
A cell which contains more than one cell it will be called multi-cellular cell organisms. Examples are: Parmecium. etc :)
Organisms that are composed of unstructured cells surrounded by membranes are prokaryotic cells. A prokaryotic cell is a single-celled organism like an amoeba.
Protists are either unicellular of multicellular organisms. Different types of protists are classified by the characteristics that resemble those of fungi, plants, and animals.
Eukaryotes have a nucleus, Archaea do not.
no. they can be unicellular or multicellular.the organisms in this phylum are those which do not fit in the defination of plants, animals and fungus.it not depends either they are unicellular or multicellular :)
The Cambrian explosion is an apparently sudden increase in fossils marking the separation between Precambrian rocks and Cambrian rocks. At one time this was believed to mark the beginning of multicellular life, but in fact it only marks the evolution of hard body parts (most of which were made of calcium carbonate). It turns out that there were as many multicellular organisms in the late Precambrian as there were during the Cambrian explosion at the beginning of the Cambrian, but the lack of hard body parts in those organisms made the formation of easy to identify fossils of those organisms much rarer.
No
it depends and what type of organism, you are an organism, plants and animals are organisms, the cells that make up tissues, organs, organ systems in an organism, i mean the organism could be a tiger or a blue whale. organisms live depending on the type of organism.