Starfish

Well, sweetie, using a scalpel to cut a starfish open is like trying to use a toothpick to chop down a tree - it's just not gonna work. Starfish have a water vascular system that helps them move and eat, so cutting them open with a scalpel would just be cruel and pointless. Plus, I'm pretty sure the starfish wouldn't appreciate it much either.

• the differences is that a fish has

first put it in water with regular salt [ preferably kosher salt or sea salt ] wait about 6 days before it lives again the way you know it is alive is look on the back of it and it will look different by : Nana boateng

5

Well, isn't that a curious question, my friend! Penguins mostly enjoy dining on fish and squid, but they might not find starfish to be their preferred meal. Each animal has its own unique diet that suits their needs, just like how we all have our favorite foods that make us happy.

Crabs have shells. Starfish have 5 legs.

Hassock

Suckers on a starfish, known as tube feet, are small, flexible, fluid-filled tubes that are part of the water vascular system. They work by contracting and expanding to create suction, allowing the starfish to anchor themselves, move, and capture prey. Tube feet also help the starfish control the flow of water in and out of their body, aiding in respiration and circulation.

Organisms with radial symmetry and tube feet are typically found in water environments, such as sea stars and sea urchins. Radial symmetry allows these organisms to efficiently capture food and navigate their watery habitats, while tube feet help in movement and feeding by using a hydraulic system to create suction. Both features are adaptations that make these animals well-suited for life in aquatic environments.

No, sea stars use their tube feet to pry open the clam's shell and then evert their stomach into the clam to digest its soft tissues. Without the use of tube feet, the sea star would not be able to access the clam's flesh to consume it.

Feather stars and sea lilies are related but not the same. They both belong to the class Crinoidea, but feather stars can crawl and swim while sea lilies are sessile, anchored to the seafloor by a stalk.

Some protists are phototrophs ie they get energy via photosynthesis. . Energy from sunlight is used to convert carbon dioxide and water into organic materials to be used in cellular functions such as biosynthesis and respiration.

Examples are: Algae, Dinoflagellates or Euglena .

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.