How Do Sponges Acquire Their Nourishment??
Sponges must pump water through their bodies in order to eat. Because sponges are sessile, meaning they cannot move, they filter water to obtain their food. They are, therefore, known as filter feeders. … The sponges often have tube-like bodies with many tiny pores.Jul 3, 2019
Which of the following animals is most closely related to the hagfish?
Molecular analysis since 1992 has suggested that hagfish are most closely related to lampreys, and so also are vertebrates in a monophyletic sense. Others consider them a sister group of vertebrates in the common taxon of craniata.
What defines radial symmetry group of answer choices?
What defines radial symmetry? Only five planes of symmetry passing through the center of the organism splits it into equal halves. … Any plane of symmetry passing through the center of the organism splits it into equal halves.
Which of the following is a defining characteristic of animals?
All animals are eukaryotic, multicellular organisms, and almost all animals have specialized tissues. Most animals are motile, at least during certain life stages. Animals require a source of food to grow and develop. All animals are heterotrophic, ingesting living or dead organic matter.
Which arthropod subgroup includes those with an exoskeleton of chitin?
Phylum Arthropoda. Arthropods are the largest grouping of animals all of which have jointed legs and an exoskeleton made of chitin.
Who eats slime eels?
In some Asian countries like Japan and Korea, slime eels are considered a delicious food. In South Korea, they are often grilled in markets and sold to eat. Because they are popular to eat, some hagfish populations are fished too much. Fishermen in the United States catch them and send them overseas to be eaten.Are spiders vertebrates?
An invertebrate is an animal without a backbone. In fact, invertebrates don’t have any any bones at all! Invertebrates that you may be familiar with include spiders, worms, snails, lobsters, crabs and insects like butterflies. However, humans and other animals with backbones are vertebrates.
What is jellyfish symmetry?
Jellyfish and many other marine animals such as sea urchins, sea stars, and sea anemones have what is known as radial symmetry.Do sponges have radial symmetry?
Sponges are unsymmetrical or radially symmetrical, with many cell types but no distinct tissues; their bodies contain numerous pores and sharp protective spicules. Coelenterates (phylum Cnidaria) are radially symmetrical, with two tissue layers (ectoderm and endoderm) surrounding an all-purpose gastrovascular cavity.
Do sponges have bilateral symmetry?
Sponges have asymmetrical symmetry. When an animal’s body shape is asymmetrical, there is no axis or line that can be drawn where it is essentially…
Which of the following best describes sponges?
What do sponges and cnidarians have in common? Which of the following best describes sponges? They are asymmetrical, lack tissues, and do not move. They are symmetrical, lack tissues, and do not move.
Why are sponges considered animals?
Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. … All sponges are sessile aquatic animals, meaning that they attach to an underwater surface and remain fixed in place (i.e., do not travel).What is the scientific name of the elephant?
African elephants/Scientific names
Species. Historically, elephants were classified into two species, the African (Loxodonta africana) and Asian (Elephas maximus) elephants. However, genetic research has provided new insight to elephant “relatedness” and taxonomic classification at the subspecies level.
Are butterflies arthropods?
Arthropods are a motley crew: cockroaches, crabs, butterflies, beetles, centipedes, scorpions, shrimp, spiders, lobsters, lice, ticks, termites, potato bugs, and sea monkeys (a.k.a., brine shrimp) — they’re all examples of arthropods.
What make the arthropods successful?
The success of the arthropods can mainly be attributed to the presence of exoskeleton, which makes them versatile, is protective in nature and also allows flexibility and mobility. You can see arthropods living on land and in water. They are also a source of food for many animals and human beings too!How did arthropods evolve?
It seems likely that arthropods evolved from the same root as the annelids and that the three main lineages of arthropods – the Chelicerata, the Crustacea and the Insecta – evolved independently from a common ancestor. Little is known of the ancestors of living arthropods.How is hagfish slime used?
“The synthetic hagfish slime may be used for ballistics protection, firefighting, anti-fouling, diver protection, or anti-shark spray,” biochemist Josh Kogot said in a statement. “The possibilities are endless.” Other animals do use glues to protect themselves.
Do Petromyzontida have jaws?
The discussion below, for convenience, separates the modern “cyclostomes” into the class Myxini and class Petromyzontida. The defining features of the living jawless fishes are the lack of jaws and lack of paired lateral appendages (fins).
How is hagfish slime used as a defense mechanism?
Hagfish are marine fish shaped like eels, famous for releasing large quantities of “slime” that unfolds, assembles and expands into the surrounding water in response to a threat or a predator’s attack. This defense mechanism even works against sharks by effectively clogging their gills or choking them.
Do spiders pee and poop?
In truth, spiders do not have separate urine and feces, and their droppings consist largely of guanine, which is a component of DNA and found in all living things; highly unlikely to cause any skin reaction!
Is a worm a reptile or an insect?
Invertebrate animals commonly called “worms” include annelids (earthworms and marine polychaete or bristle worms), nematodes (roundworms), platyhelminthes (flatworms), marine nemertean worms (“bootlace worms”), marine Chaetognatha (arrow worms), priapulid worms, and insect larvae such as grubs and maggots.Are worms animals or insects?
worm, any of various unrelated invertebrate animals that typically have soft, slender, elongated bodies. Worms usually lack appendages; polychaete annelids are a conspicuous exception.
Is Jelly a medusa or polyp?
Jellyfish have a stalked (polyp) phase, when they are attached to coastal reefs, and a jellyfish (medusa) phase, when they float among the plankton. The medusa is the reproductive stage; their eggs are fertilised internally and develop into free-swimming planula larvae.Can you eat jellyfish?
Jellyfish is known for a delicate, slightly salty, flavour that means it’s eaten more as a textural experience. Its slimy, slightly chewy consistency means that Chinese and Japanese gourmands often eat it raw or sliced up as a salad ingredient.Does a jellyfish have blood?
Lacking brains, blood, or even hearts, jellyfish are pretty simple critters. They are composed of three layers: an outer layer, called the epidermis; a middle layer made of a thick, elastic, jelly-like substance called mesoglea; and an inner layer, called the gastrodermis.Do sponges have organs?
Sponges are considered the oldest animal phyla. They are multicellular but do not have tissues or organs. … The small pores are the entrances to a complex system of channels through which the sponge pumps a current of water from which its cells extract tiny particles of food.
What protein holds the cells of a sponge together?
The body of the sponge is a loose collection of about six different types of specialized cells. Some of these cells secrete a supporting skeleton either of collagen fibers or of tiny, sharp mineral pieces called spicules. Collagen is a protein found in all animals that helps hold cells together.What is a sponges habitat?
Sponges are simple invertebrate animals that live in aquatic habitats. Although the majority of sponges are marine, some species live in freshwater lakes and streams. They are found in shallow ocean environments to depths as great as five kilometers (km). … Some sponges grow in thin encrusting layers over surfaces (Fig.
What helps circulate water through a sponge?
The inner layer consists of collar cells (A) whose function is to circulate water through the sponge. They do this by swishing their flagella which pulls water through the incurrent pore – water then travels out the osculum at the top of the sponge.Are sponges radial or bilateral or none?
Only sponges (phylum Porifera) have asymmetrical body plans. Some animals start life with one type of body symmetry, but develop a different type as adults; for example, sea stars are classified as bilaterally symmetrical even though their adult forms are radially symmetrical.
What two substances give the sponge support?
The two substances that give sponges support are spongin and spicules.
