Arthropods

Some chordates have them, and in some the distinction may need to be qualified. In molluscs they remain undifferentiated, in mammals for example they differentiate into separate cavities, the pleural, peritoneal and pericardial.

Yes. Arthropods are animals that have- during at least one stage in their life- segmented bodies, jointed legs, and an external skeleton called an exoskeleton. All crustaceans have segmented bodies, jointed legs, and exoskeletons. Some crustaceans like barnacles do not appear to have legs or body segments. However, these features can be seen on barnacle larvae. These are barnacles that are not yet adults and have not attached themselves to anything yet. Legs and body segments disappear from adult barnacles because they are not needed. The barnacle is still considered an arthropod because the features that define arthropods can be seen on it during part of its life.

Arthropod is a really general classification; it's a phylum, man, there are a whole lot of disparate critters that fall under this category. From wikipedia: "An arthropod is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages."

No. Sea urchins are echinoderms, meaning, appropriately enough, "spiny skin". Some of the characteristics of arthropods are jointed appendages, an exoskeleton, and a segmented body. While the hard test, or shell, of sea urchins could be thought of as an exoskeleton, sea urchins have no jointed appendages and do not have a segmented body.

Some examples of arthropods are shrimps, crabs, lobsters, and insects.

An arthropod is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages. Arthropods are members of the Phylum Arthropoda (from Greek ἄρθρον arthron, "joint", and ποδός podos "foot", which together mean "jointed feet"), and include the insects, arachnids, crustaceans, and others

The Mollusca, common name molluscs or mollusks,[note 1] is a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. This is the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. Molluscs are highly diverse, not only in size and in anatomical structure, but also in behaviour and in habitat.

Actually, a sea anemone is none of these. Sponges are sessile creatures, arthropods have exoskeletons, and fish swim. Sea anemones are a type of cnidarian. They often reproduce by releasing polyps. They are related to corals and jellyfish.

Generally, yes. If you find one in your house/apartment then you will want to take steps to kill all the potential ones lurking in their dark hiding places. Check out some of the other Q&A pages here to find out the best solutions for killing 'um. Also, keep in mind that prevention is critical, don't leave food out, never leave dirty dishes over night, try to seal up any entry points you can find, and so on.

Flies are generally considered to be pests, but they do serve a purpose. This purpose is served in the ecosystem. When flies lay their eggs, maggots help to break down garbage and organic matter. Flies also help to pollinate crops as fly around them.

The larvae form of amphibians live in water and have gills. When they grow into their adult form they develop lungs. There are three orders of amphibians, Urodela, Anura and Apoda. Some Urodela (e.g Axolotls) retain their gills as adults, other orders do not.

The treatments can be compared to each other instead of to a control

There are well over one million species of arthropods on Earth. All insects, arachnids (spiders), myriapods (centipedes, etc), and crustaceans (shrimp, lobsters, etc.) are arthropods. The smallest weigh less than 25 millionths of a gram and the most massive of all living arthropods, the American lobster, can weigh up to 20 kilograms (44 pounds). Some are so small that they cannot be seen without a microscope, although the Japanese spider crap has legs that span up to 5.5 meters (18 ft) from claw tip to claw tip.

Arthropleura was a distant relative of millipedes and centipedes but much much bigger. Arthropleura lived in the carboniferous period.

They smell like ammonia after they're cooked. That's why lobsters are usually cooked alive, because they deteriorate very quickly after death. And obviously, if you only have the tail, the lobster is dead.

When they grow, they have to molt their exoskeletons. That is also less accurately described as "shedding their skin".

Yes, a spider belongs to Phylum Arthropoda.

Because all of the chemicals or chemicaly related toxens that are in the air and on the plants to kill bugs are deadly, but mistakingly butterflies eat the pollen off of plants which means they will apparenently die after they eat the pollen because it probably was sprayed.

an example of this besides the butterflies is oviously the bees.

also when people catch them sometimes it ingers them an that means they can't fly,or walk .it only depends where they got ingered.the consequinces for that is they will die

cause if they can't rely on their abilities then they can't escape or even do the natural things of life they where created to do . last of all i can think of is that the birds eat insects like bees,worms, butterflies,Spiders,and even more.

Yes. Arthropods are characterized by an exoskeleton made mostly from the tough protein chitin, also joint appendages and segmented bodies.

Insecta you nucking retards!

Earthworms decompose dead organisms

Crayfish are members of the crustacean family.

The arthropod body plan has a great deal to do with how they are classified. Insects are hexapods with three body sections, a head, consollidated thorax with three leg pairs, and an abdomen. The chelicerates, like arachnids, have two main body sections and eight legs. Myriapods have up to hundreds of sections each with a leg pair. Many crustaceans are decapods, have ten legs, often a fused cephalothorax and articulated abdominal segments like lobsters, crayfish, shrimp, prawns and krill; similar is true of crabs except the short abdomen (tail) is folded up beneath the thorax. Trilobites (now extinct) are named for having three longitudinal lobes.

They all have, it's what their name means in Latin. Insects, arachnids, crustaceans and centi/millipedes all have jointed legs.

No. Vertebrates are only one phylum (Chordata), all the others don't have a backbone. Those are literally everything but fish, amphibians, reptiles, birds and mammals.

An aquatic animal's nervous system would function pretty much the same as their land-based counterparts; also showing a similar degree of variation and complexity. The size and characteristics depend on the species, but the components in aquatic environment are the same as in the terrestrial: the basic unit of the nervous system is a nerve cell or neuron, which has an electrical resting potential created by an electrical potential difference across the cell membrane caused by ions such as sodium, potassium and calcium. This balance can quickly change or become depolarized as a result of a received stimulus, for example from a neighboring neuron via chemical transmitters across a gap (synapse) between the two adjacent nerve cells. The nerves are connected into neural networks, which, together with a brain, spinal cord and nerve bundles (ganglia) throughout the body, constitute the nervous system.

The degree of complexity varies with the organism's need to transport stimuli around the body. The simplest organisms, (including aquatic ones) don't use or need a nervous system. Notionally if you are unicellular there is little requirement for a nervous system, since ostensibly the purpose of a nerve network would be to propagate a signal between different parts of a large multicellular body. The bigger and more complex the organism and more complicated tasks tasks it needs to perform the more urgent the need for an organized means of transporting stimuli. Yet, some relatively large multicellular aquatic animals have nothing which we might term a nervous system, like the sea sponges (Porifera). Sea anemones have a primitive nervous system but no real brain and no dedicated sensory organs; the nerves facilitate responses to stimuli and other biochemical processes but are not centralized. Some like jellyfish are similarly de-centralized, evidencing a network of nerves and ganglia but again nothing we might call a brain, yet are capable of responding to stimuli, including detection of salinity, co-ordination of movement, and in some, specialized sensory structures and a response to light with simplified eyes (ocelli). Arthropods, like crabs, lobsters, shrimp, etc., have a ladder-like system of nerves on their underside with paired ganglia in each segment, terminating in a rather small brain around the esophagus. Cephalopods, for example octopi, often considered the most intelligent invertebrates, have well-developed senses and large centralized nervous system (brain) and have shown the ability to learn and employ mimicry or insight to solve problems. Aquatic mammals like dolphins have acute eyesight and hearing and large, highly developed brains, and evidence social behavior, co-operation, and significant problem-solving and learning abilities.

they can shoot webs at anything like spiderman and with their laser eyes