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Starfish
Also known as sea stars, these echinoderms are 2,000 species strong and found in seas and oceans all over the world. They can vary in size from less than half an inch to more than four feet across.
1,388 Questions
One early developmental event suggesting frogs are more closely related to sea stars than either group is related to snails or worms is gastrulation. In both frogs and sea stars, gastrulation involves the formation of a blastopore that becomes the opening of the digestive tract, while this differs in snails and worms. Additionally, frogs and sea stars share radial cleavage during early cell divisions, unlike the spiral cleavage seen in snails and worms.
Why are starfish in the echindoerm?
If you look at an echinoderm such as a sea urchin or a sand dollar, you will see that the shell is covered in a pattern (of ambulacral and interambulacral areas) with 5 fold symmetry. A starfish has 5 arms and if you imagine a starfish folding its arms up and over its back until the tips meet, then you will see it begins to resemble a sea urchin, the two are clearly related and have a common ancient ancestor.
The ventral surface of a starfish is called?
the ventral surface of a starfish is called oral
You Jerk.
Can starfish live in the Arctic?
Yes, certain species of starfish can live in the Arctic. They have adapted to the cold temperatures and are able to survive in the frigid waters of the Arctic Ocean. These starfish have unique adaptations that help them thrive in this harsh environment.
What is a feature that a virus bacteria and protist have in common?
actually your wrong im also in 7th grade science they are both a single celled organism
Interconnected canals and hollow tube feet work together in sea star's what?
Interconnected canals and hollow tube feet work together in a sea star's water vascular system, which helps with movement, feeding, and respiration. Sea stars use water pressure to extend and retract their tube feet, enabling them to grip surfaces and capture prey.
Explain how protists differ from other organisms?
All protists are eukaryotic (have a nucleus), most live in water. They are the "ancestor organisms" because they were the first organisms ever to exist.
Protists are simply organisms that don't fit into any of the other kingdoms.
The great diversity of form, habitat, mode of nutrition, and life history exhibited by eukaryotes suggests they evolved several times from various groups of prokaryotes. This makes the Protista a polyphyletic group. Eukaryotes are generally larger, have a variety of membrane-bound organelles, greater internal complexity than prokaryotic cells, and has a secialized method of cell division (meiosis) that is a prelude to true sexual reproduction. Protists might be viewed as a group from which the other eukaryotic kingdoms evolved.
What phylum and class do the moth belong to?
Moths belong to the phylum Arthropoda and the class Insecta.
What is the life span of the Crown of Thorns Starfish?
Crown of Thorns Starfish can live for up to 10 years in the wild.
How do the starfish and other plants in the beach ecosystem interconnect?
Starfish are predators that feed on mussels and other shellfish in the beach ecosystem, helping to control their populations. Other plants in the ecosystem provide shelter and food for small organisms that the starfish may also feed on. This interconnected relationship helps maintain a balance within the ecosystem.
What is a animal-like protist?
Animal-like protists are called protozoa. Protozoaare single-celled eukaryotes that share some traits with animals. Like animals, they can move, and they are heterotrophs.
One celled animal like protists?
Examples of one-celled animal-like protists include amoebas, paramecia, and trypanosomes. These protists are eukaryotic organisms that possess animal-like characteristics such as mobility and heterotrophic feeding behavior. They can be found in various aquatic environments and play important roles in nutrient cycling and food chains.
How can you tell if a protist is a producer?
Protists that are producers typically contain chloroplasts, allowing them to photosynthesize and produce their own food using sunlight, water, and carbon dioxide. These protists are usually green in color due to the presence of chlorophyll. Additionally, they release oxygen as a byproduct of photosynthesis.
Would a spherical protist or a cylindrical protist have a higher surface area to volume ratio?
A cylindrical protist has a higher surface are to volume ratio. This is because of the physical properties of spheres (some rather complicated math proves that spheres hold the most volume for their area).
Is the starfish a carnivore herbivore or omnivore?
Carnivore
Diet
Common starfish eat bivalves, polychaete worms, small crustaceans and other echinoderms (the group which includes urchins and starfish).
No, starfish are not omnivores. They are primarily carnivores, feeding on small organisms like bivalves, barnacles, and snails. They use their tube feet to pry open the shells of their prey and then push their stomachs outside their bodies to digest their food.
All protists possess a eukaryotic cell structure, meaning they have a nucleus and other membrane-bound organelles. They are unicellular, though some can form colonies or be multicellular. Protists exhibit a wide range of nutritional modes and can be autotrophic, heterotrophic, or mixotrophic.
Starfish are Echinoderms, and there are many species in several orders.
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How do protists defend themselves?
Protists defend themselves through various mechanisms such as producing toxins, forming protective shells or cysts, using flagella to escape predators, and engulfing or expelling invaders through phagocytosis. Some protists also have mutualistic relationships with other organisms for protection.
How do starfish stay on the rocks?
The starfish takes in water into the tube feet, (expanding the tube feet) the water is then forced out of the tube feet, (contracting the tube feet) making it able to grab onto the object.
How does respiration occur in the starfish?
Respiration - The starfish has a water vascular system in which the repiratory exchange between oxygen and carbon dioxide occurs. * The tube feet of the starfish act like gills. The Oxygen enters the water vascular system through the tube feet as the carbon dioxide exits the body. http://intro.bio.umb.edu/111-112/112s99Lect/bodyplans/starfish.html
Protists synthesize their own food through a process called photosynthesis or by consuming other organisms for nutrients. They can have various methods of obtaining energy, such as using sunlight, chemical energy, or feeding on other organisms.
Which is bigger bacteria or protist?
eukaryotic cells first came about is called the endosymbiotic theory
This is wrong. Prokaryotic cells come first. The endosymbiotic theory is the hypothesis that sometime in history one bacteria 'ate' another bacteria (phagocytosis) and didn't completely digest its meal. What was left has become the modern day mitochondria in animal cells and the chloroplast and mitochondria in plant cells. Or more simply two prokaryotic cells formed a symbiotic relationship. But over time one organism gained the upper hand as their is genetic evidence for DNA transfer from the plastid in the organelle to the DNA in the nucleus.
Why does a vital function of pedicellariae clean the surface of a starfish?
Pedicellariae of a starfish help to keep its surface clean by removing debris, parasites, and algae. This cleaning function is crucial for maintaining the health of the starfish and preventing infections or blockages on its skin.
What is the endangerment of sea stars?
the answer to this question is the endangerment of sea stars are they are washed up onto the beach and then they dry out in the sun and die. This is how they are endangered. jksfdk;adjkht euirthjkas
