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Strictly speaking, the smallest animal in the world would be an amoeba. Amoebas are unicellular organisms, which means they are comprised of only a single cell and are classed in the animal kingdom under Protozoa. So, technically speaking, Amoebas are actually animal-like protists classifed in the kingdom Protista, and thus not animals.
However many people do not consider these to be "living creatures", despite their inclusion in the animal kingdom. The other smallest animals, in order of there size, are:
The smallest insects are the male parasitic wasps. They measure only 139 micrometers in length. The females are around 40% larger than the males. These are the smallest animals, when amoeba and the like are not included.
The smallest beetle belong to the Nanosellini tribe. They all measure less that 1mm in length. The smallest in Scydosella musawasensis at 300 micrometers long.
The smallest animal with a backbone is a species of fish, known as Stout Infant Fish. It measures just about 7mm in length and is found in Australia's Great Barrier Reef.
The smallest amphibians are the Monte Iberia Eleuth and the Brazilian Gold Frog. Both measure around 9.6mm to 9.8mm in length.
The smallest reptile is the Jaragua Sphaero, also called Dwarf Gecko. It measures 16mm long.
The smallest bird is Bee Hummingbird, as the measure around 5 cm in length.
The smallest mammal is Kitti's Hog-nosed Bat, also known as the Bumblebee Bat. It is found in Thailand and it only measures 30mm to 40mm.
bird : humming bird
insect : ant
The smallest animal would be the ameba.
And if you are referring to the smallest "mammal", the correct answer would be The Shrew.
What else can I help you with?
Which animal kingdom has no nucleus?
The animal kingdom that lacks a nucleus is the kingdom Monera, which includes bacteria. Bacteria are prokaryotic organisms, meaning they do not have a membrane-bound nucleus like eukaryotic organisms.
Which kingdom does not classify autotrophic organisms?
The kingdom Animalia contains non-autotrophs.
What kingdom contains only organisms that have many cells with no cell walls and are all heterotrophic?
The kingdom that fits this description is Kingdom Animalia. Animals are multicellular organisms that lack cell walls and must obtain their nutrients by consuming other organisms or organic matter. They are also characterized by their ability to move and respond to their environment.
What animals are organisms?
Animals are multicellular organisms belonging to the kingdom Animalia. They are typically characterized by their ability to move, consume organic material for energy, and lack a cell wall. Common examples include mammals, birds, reptiles, amphibians, and fish.
What kingdom is a sponge in?
Sponges are part of the animal kingdom, specifically in the phylum Porifera. They are multicellular organisms that lack true tissues and organs.
How are worms and sponges different?
Worms are multicellular organisms belonging to the animal kingdom, while sponges are multicellular organisms belonging to the animal phylum Porifera. Worms have bilateral symmetry and a digestive system, while sponges lack symmetry and have a porous body structure supported by spicules or spongin fibers.
Within a kingdom what is the largest grouping of organisms?
The Animal Kingdom.
Which kingdom is made up of multicellular heterotrophs only?
The animal kingdom consists of only multicellular heterotrophs.
Name the second smallest group in kingdoms?
The second smallest group in the animal kingdom is the genus
What kingdom have the smallest cells?
A cell without a distinct nucleus is in the kingdom Prokaryota. Other cells (Eukaryota) are in either the Animal or Plant kingdom
How many species of organisms are in the animal kingdom?
All of them
Which Kingdom of living things consists of multi-celled heterotrophic organisms?
Animal Kingdom.
Which Kingdom of living things consists entirely of multi-celled organisms?
Animal Kingdom.
What has the smallest penis in the animal or insect world?
A flea has the smallest penis and they have two.
Which animal kingdom has no nucleus?
The animal kingdom that lacks a nucleus is the kingdom Monera, which includes bacteria. Bacteria are prokaryotic organisms, meaning they do not have a membrane-bound nucleus like eukaryotic organisms.
Which kingdom does not classify autotrophic organisms?
The kingdom Animalia contains non-autotrophs.
Which other characteristic is common to organisms in this kingdom animal?
i can't answer it
