Invertebrates

There are many orders of sea urchins. The ones in the Subclass Euechinoidea go like this: Superorder Atelostomata - Orders Cassiduloida and Spatangoida; Superorder Diadematacea - Orders Diadematoida, Echinothurioida, and Pedinoida; Superorder Echinacea - Orders Arbacioida, Echinoida, Phymosomatoida, Salenioida, and Temnopleurioda; Superorder Gnathostomata - Orders Clypeasterioda (sand dollars) and Holectypoida.

Honey typically takes the longest to spoil out of the three options you listed (cashew, pasta, honey). Honey has a very long shelf life due to its low water content and natural acidity, making it resistant to spoilage. On the other hand, cashews and pasta have a higher moisture content and are more prone to spoilage compared to honey.

Invertebrates play crucial roles in ecosystems as predators, prey, decomposers, pollinators, and more. Their diverse functions help maintain the balance of ecosystems and support the survival of various species, including vertebrates. Without invertebrates, many ecosystems would collapse, leading to cascading effects on biodiversity and overall ecosystem health.

Sea urchins have a hard shell called a test that protects their soft inner body. They also possess tube feet that help them move and cling to surfaces. Sea urchins are able to feed on algae and organic matter using a specialized feeding structure called Aristotle’s lantern.

To make a model of a sea urchin, you can start by shaping a round sphere out of clay or paper mache to represent the body. Then, attach smaller spheres or spiky shapes around the main body to represent the spines. Paint the model in appropriate colors and add any other details as needed.

No way. Predation benefits the symbiont and harms (kills) the host, or prey. In parasitism, the host may not die, but the symbiont still lowers the host's fitness by, for example, leeching nutrients or blood off of the host.

Mutualism is when both the host and symbiont benefit.

Diatoms are believed to have originated during the Jurassic period, around 250 million years ago. They are a type of algae that adapted to live in both freshwater and marine environments, and have since become one of the most diverse and abundant types of phytoplankton in the world.

If your garden is not too big, use baiting technique, that means you are the "Bait", when they come to you, just use forceps to pick them up and soak them in the salt water (50g/100ml) to kill them.

Non-vertebrate animals play important roles in ecosystems, such as pollination, decomposition, and nutrient cycling. They also contribute to biodiversity and provide valuable resources for humans, such as food and medicine. Additionally, studying non-vertebrate animals can help us better understand evolutionary processes and biological systems.

suspension

A Didinium is a protist that feeds by ingesting bacteria (bacteriovorus) through a mouth-like opening at the anterior end of the cell. The cell has an equatorial gridle of cilia, with a second gridle surrounding the anterior end. Cilia may assist in sweeping bacteria toward opening.

Some examples of platyhelminthes, also known as flatworms, include planarians, flukes, and tapeworms. Planarians are free-living flatworms found in freshwater environments. Flukes are parasites that can infect various animals, including humans. Tapeworms are also parasitic and can be found in the intestines of vertebrates.

The phylum Chordata is defined by four characteristic traits: Pharyngeal gill slits, a notochord, a dorsal hollow nerve cord, and a muscular post-anal tail.

There are three subphyla of Chordates: Urochordata, Cephalochordata, and Vertebrates.

So it depends on what species you are dealing with if you are looking at specifics. But a spine is not a characteristic of all chordates.

Centric diatoms have a spherical shape that helps them float and stay suspended in the water column, which is more common in saltwater environments with consistent water movement. Pennate diatoms have a more elongated shape that allows them to attach to surfaces in freshwater environments where there may be less water movement. This difference in shape relates to their respective preferences for saltwater and freshwater habitats.

In 1703, an anonymous English microscopist sketched and described the first known diatom, Tabilarria Flocculosa. His sketches were published by the Royal Society of London. His name is yet to be known until this day.

Paramecium look like little peanuts or slippers, with one end coming to a point. They are very tiny, (about 0.02 in) and you will need to look under a microscope to see one, and it is very difficult as they move quickly.

Yes, centric diatom are algae that are species that display radial symmetry. Diatoms are like clams, they have a two-part silica cell wall, called frustules. Diatoms are then divided into two groups based on the symmetry of their frustules, bilaterally symmetrical are called pennate diatom and centric diarom are radial symmetrical.

Paramecium are typically found in freshwater environments such as ponds, lakes, and slow-moving streams. They are also commonly found in microbiology laboratories where they are studied as model organisms.

The body of a sponge is made up of many pores and channels through which water circulates to bring in food and oxygen and remove waste. It is supported by a skeleton made of a flexible protein called spongin or hard structures called spicules. Sponges have no true tissues or organs and rely on specialized cells for various functions.

Ever since the atom joined with another atom to create a diatom, it has been the greatest structure in the universe. However, when the polymer was created, which has not just two atoms, but many thousands of atoms, the diatom has been bitter with jealousy that it is no longer the biggest fish in the pond. Therefore the polymer is the diatoms enemy.

Yes, phytoplankton are a type of microorganisms that include many types of algae. They are microscopic, photosynthetic organisms that drift in water bodies and form the base of the aquatic food chain.

No, an olm is not an invertebrate. It is a species of aquatic salamander belonging to the order Caudata, which are vertebrates.