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Animals consume organic material, breathe oxygen, and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the ______, during embryonic development
Animals consume organic material, breathe oxygen, and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the ______, during embryonic development
blastula
As of 2022, 2.16 million living animal species have been described—of which around 1.05 million are ______, over 85,000 are molluscs, and around 65,000 are vertebrates
As of 2022, 2.16 million living animal species have been described—of which around 1.05 million are ______, over 85,000 are molluscs, and around 65,000 are vertebrates
insects
Animals range in length from 8.5 micrometres (0.00033 in) to 33.6 metres (110 ft). They have complex interactions with each other and their environments, forming intricate ______
Animals range in length from 8.5 micrometres (0.00033 in) to 33.6 metres (110 ft). They have complex interactions with each other and their environments, forming intricate ______
food webs
The scientific study of animals is known as ______
The scientific study of animals is known as ______
Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the ______, containing animals such as nematodes, arthropods, flatworms, annelids and mollusc
Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the ______, containing animals such as nematodes, arthropods, flatworms, annelids and mollusc
What is a taxonomy?
What is a taxonomy?
What does a taxonomy organize?
What does a taxonomy organize?
What is the difference between taxonomy and meronomy?
What is the difference between taxonomy and meronomy?
What are some uses of a taxonomy?
What are some uses of a taxonomy?
What are taxonomic units known as?
What are taxonomic units known as?
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Study Notes
General Characteristics of Animals
- Animals are multicellular and eukaryotic, categorized under the kingdom Animalia.
- Most animals consume organic material and breathe oxygen.
- They possess myocytes (muscle cells) and have the ability to move.
- Reproduction is primarily sexual, and development begins from a hollow sphere of cells known as the blastula.
Species Diversity
- As of 2022, there are 2.16 million described living animal species.
- Insects are the most numerous, with approximately 1.05 million species identified.
- Other significant groups include over 85,000 molluscs and around 65,000 vertebrates.
- Estimates suggest there could be around 7.77 million total animal species worldwide.
Size Variation
- Animal sizes vary dramatically, ranging from 8.5 micrometres to 33.6 metres (110 feet).
Ecological Interactions
- Animals engage in complex interactions, forming intricate food webs within their ecosystems.
Scientific Study
- Zoology is the scientific discipline focused on the study of animals.
Classification and Symmetry
- Most animal species fall within the Bilateria clade, characterized by bilaterally symmetric body plans.
- Bilateria includes protostomes, which encompass various animals like nematodes, arthropods, flatworms, annelids, and molluscs.
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