Starfish

At night when the stars are reflected on the calm surface of the water, the seas might be "star filled."

or when they are star(fish) filled. The oceanic expanse is the Cosmos for innumerable tiny star-like creatures called Diatoms whose silica structured forms resemble snow-flakes or miniature stars which are one of nature's marvels. I venture to say that they float amidst the eddies and tides like celestial dancers on the ethers of space.

Starfish reproduce externally by releasing eggs and sperm into the water where fertilization occurs. The fertilized eggs develop into larvae which are released into the water. The larvae eventually settle on the ocean floor and develop into adult starfish.

Protists maintain water balance through osmoregulation, which involves controlling the movement of water and ions across their cell membranes. They use contractile vacuoles to regulate water content by expelling excess water that enters the cell through osmosis. Additionally, some protists have adapted to specific environments by evolving structures or behaviors that help them avoid dehydration or over-hydration.

Fungus and protists help us in many ways. Fungus and protists are used in food to make it tasty. Example of a fungus used in food is yeast (makes your bread rise). Medicine for example Penicillin comes from a mold of Penicillium. They affect our ecosystems and are used for industrial purposes.

In protists, the processes involved in the transport of materials include diffusion, active transport, phagocytosis, and pinocytosis. Diffusion allows small molecules to passively move across the cell membrane, while active transport uses energy to move materials against a concentration gradient. Phagocytosis involves the engulfment of solid particles by the cell, while pinocytosis facilitates the uptake of fluids and dissolved molecules.

One piece of evidence supporting the idea that poriferans evolved from protists is the similarity in genetic sequences between certain protists and sponges. Additionally, some protists share characteristics with poriferans, such as the presence of collar cells, which suggests a possible evolutionary relationship between the two groups. Studies of early fossil records also provide some evidence of a transitional form between protists and sponges.

Protists can have both positive and negative effects on the animal they live in. Some protists can form mutualistic relationships with animals, providing benefits like aiding in digestion or protecting against pathogens. However, other protists can be parasitic and harm the animal by causing infections or diseases.

The frog blastula is formed through holoblastic cleavage, resulting in a multicellular blastula with a fluid-filled cavity (blastocoel). In contrast, the sea star blastula is formed through radial holoblastic cleavage, leading to a solid blastula with no blastocoel. Additionally, the frog blastula undergoes gastrulation to form a gastrula with three germ layers, while the sea star blastula directly develops into a bipinnaria larva without gastrulation.

Echinoderms like sea stars have tube feet that are arranged in a radial pattern around their body, allowing them to capture prey from any direction. Their ability to extend their stomach out of their mouth also helps them feed on prey that might be out of reach. This feeding strategy is effective for an organism that stays anchored in one spot.

Starfish undergo external development. Fertilization usually occurs externally in the water, and the larvae develop outside the adult's body before settling down and metamorphosing into the adult form.

Humans effect sea stars because now that the earth is heating up, the water is rising, and the sea stars shadow water tide pools are being turned into part of a deepier water system that they can't survive on.

expands and becomes rigid due to increased internal pressure, allowing the starfish to move and grip onto surfaces. This hydraulic system is controlled by a series of muscles that regulate the flow of water in and out of the tube feet, enabling the starfish to navigate its environment.

Baby sea stars are called "larvae" or "planktonic juveniles" before they mature into adults.

Sea stars like to eat a variety of prey including small fish, clams, mussels, and barnacles. They use their tube feet to pry open the shells of their prey and then extend their stomach out of their mouth to digest the soft tissues.

The dorsal surface of a starfish refers to the top surface of its body, which is typically covered with spines or other protective structures. It is opposite to the ventral surface, which is the underside of the starfish that may have tube feet used for locomotion.

Both crayfish and starfish have a cardiac stomach and a pyloric stomach. The cardiac stomach is responsible for receiving and grinding food, while the pyloric stomach is responsible for digesting and absorbing nutrients.

seeing as starfish live in most, if not all levels of the sea, any plant you can think of as being a marine plant lives where starfish live. Examples: phytoplankton, red algaes, green algaes, brown algaes, sea grasses.

Both bacteria and protists share processes such as reproduction, metabolism, growth, and response to stimuli. Additionally, they both possess genetic material in the form of DNA and have cell membranes that regulate the flow of substances in and out of the cell.

The blastula in sea star development is larger than the fertilized egg. As the zygote undergoes multiple rounds of cell division, it forms a hollow ball of cells called the blastula. This growth is accompanied by an increase in overall size.

Yes, in sea star development, the entire zygote is involved in early cleavage. Cleavage is a series of rapid cell divisions that leads to the formation of smaller cells called blastomeres. These early cleavage divisions help to increase the overall number of cells in the embryo.

Protists are made up of very large, diverse group of organisms, including the plant-like protists (algae), fungi-like protists, and the animal-like protists (protozoans). They are all eukaryotic, and most are unicellular.

Yes, each arm of a starfish contains a duplicate set of organs, including reproductive organs, digestive glands, and nerves. This duplication allows a starfish to regenerate lost arms since each arm has the potential to grow into a new, fully functioning starfish.

No, starfish are deuterostomes. They belong to a group of animals where the blastopore becomes the anus during embryonic development. This is opposed to protostomes, where the blastopore becomes the mouth.

One basic difference is their mode of nutrition: protists are typically single-celled organisms that can be autotrophic or heterotrophic, while fungi are multicellular organisms that are heterotrophic, meaning they obtain nutrients by absorbing them from their environment. Additionally, protists are usually motile, while fungi are mostly immotile.