uterine and smooth), from lower classes within the vertebrate phylum (amphibian, fish and cyclostome) and from representatives of different invertebrate phyla (arthropod, mollusc, echinoderm ...

Animals make up over 75% of all species on Earth and fall into two categories: vertebrates and invertebrates. Invertebrates are animals lacking a backbone, and vertebrates are those with a backbone.

Blob is a very simple invertebrate, just like worms or jellyfish. Over 96% of all the animal species on Earth ... body a bit like a suit of armour. Vertebrates have a backbone inside their body.

This is a well-written important paper on the recovery of fauna and flora following the end-Permian extinction event in several continental sites in northern China. The convincing conclusion, a rapid ...

Feb. 10, 2025 — Evolution is traditionally associated with a process of increasing complexity and gaining new genes. However, the explosion of the genomic era shows that gene loss and ...

9, 2025 — A recent study has uncovered the surprising evolutionary origin of the mammalian outer ear, linking it to the gills of ancient fish and marine invertebrates. The research reveals that ...

It's tiny, covered in hair, and has spines filled with venom potent enough to cause long-lasting, painful, effects, like muscle spasms, in humans ...

Animal health includes companion, livestock, and wildlife health and should be a full and standalone topic, as vertebrate and invertebrate animals have a crucial role in planetary health. Second, ...

Redwood City’s Pets In Need is one of several shelters that has received cats and dogs relocated to free up space for displaced animals Click to share on Facebook (Opens in new window ...