Quick Answer: The Only Animal In Which Digestion Occurs Within Cells Is?

Which method of reproduction is used by members of phylum echinodermata?

Asexual reproduction in echinoderms usually involves the division of the body into two or more parts (fragmentation) and the regeneration of missing body parts.

Which phylum contains the greatest diversity of animal species?

Arthropoda arth-roh-POH-duh (over 800,000 species described; estimates of actual diversity vary but go as high as 9 million species): The most diverse and successful animal phylum on earth (incorporating about 75% of all described animal species), the Arthropoda are characterized by jointed legs and a chitinous

Are bilaterally symmetric animals usually sessile?

Bilaterally symmetric animals are usually sessile.

Which of the following features are found within the Lophotrochozoa quizlet?

Which of the following features are found within the lophotrochozoa? Bilateral symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as protostomes. Bilateral symmetry at some point in their life, two germ layers as embryos, are aquatic, and are classified as protostomes.

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How do echinoderms eat?

Echinoderms have a simple digestive system with a mouth, stomachs, intestineand anus. In many, the mouth is on the underside and the anus on the top surface of the animal. Sea stars can push their stomachs outside of their body and insert it into its prey allowint them to digest the food externally.

How do echinoderms reproduce?

Reproduction. Echinoderms are sexually dimorphic and release their eggs and sperm cells into water; fertilization is external. In some species, the larvae divide asexually and multiply before they reach sexual maturity. Echinoderms may also reproduce asexually, as well as regenerate body parts lost in trauma.

What do all Deuterostomes have in common?

All deuterostomes have a similar pattern of early embryonic development. All deuterostomes are triploblastic and have three tissue layers. All deuterostomes have a coelom. All deuterostomes exhibit radial symmetry in their bodies.

What phylum has most species?

Arthropoda The arthropod phylum includes all insects, spiders and millipedes, as well as crustaceans and sea spiders. The long-extinct trilobites were also arthropods. Arthropoda is currently the largest phylum, with well over a million species.

Which phylum is Pseudocoelom found?

Lepisma: Pseudocoelom is found in animals belonging to phylum Nematoda or Aschelminthes.

Which animal is radially symmetrical?

Radial symmetry is found in the cnidarians (including jellyfish, sea anemones, and coral) and echinoderms (such as sea urchins, brittle stars, and sea stars).

Which symmetry is most common in animals define it?

Bilateral Symmetry: Bilateral (two-sided) symmetry is the most common form of symmetry possible, and it is found throughout the biological and non-biological world.

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What are the 3 types of symmetry?

Animals can be classified by three types of body plan symmetry: radial symmetry, bilateral symmetry, and asymmetry.

Which of the following is not a type of body symmetry?

Asymmetry. Only members of the phylum Porifera (sponges) have no body plan symmetry.

What is the main difference between the Lophotrochozoa and the ecdysozoa?

What are the key differences between lophotrochozoans and ecdysozoans? Ecdysozoans have the ability to shed their exoskeleton several times throughout their life span, whereas lophotrochozoan are the animals who possess a trochophore larvae and a feeding structure called lophophore.

Which characteristic is unique to Deuterostomes?

Formation of mouth and anus The defining characteristic of the deuterostome is the fact that the blastopore (the opening at the bottom of the forming gastrula) becomes the anus, whereas in protostomes the blastopore becomes the mouth.

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