Arthropods invaded land about 100 million years before vertebrates. this fact most clearly implies that arthropods invaded land about 100 million years before vertebrates. this fact most clearly implies that arthropods evolved before vertebrates did extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates vertebrates evolved from arthropods arthropods have had more time to coevolve with land plants than have vertebrates

Arthropods invaded land about 100 million years before vertebrates. This fact most clearly implies that arthropods have had more time to coevolve with land plants than have vertebrates.

Arthropod belongs to a member of phylum Arthropoda. They are the biggest in the animal kingdom and some of them include crabs, spiders, mites, centipedes and many more.

They are invertebrate animals with an exoskeleton (they have an external skeleton that provides support for their body). Their body is segmented and they also possess jointed appendages. They are commonly known for their jointed limbs. They can as well be found in all habitats on earth.

Some arthropods live in aquatic environments while several of them also live in a terrestrial environment.

Some of their characteristics include:

Arthropods play a significant role in the human food supply and some of them also spread diseases to crops and humans.

LEARN MORE:

KEYWORDS:

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

it takes hundreds of years to become stable.

if you have another question lmk.