Echinoderms are closely related to chordates due to the following characters .

Echinoderms are closely related to chordates due to the following characters .
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Echinoderms are closely related to chordates due to the following characters . A. Tube- within - ... have mesodermal endoskeleton . D. All of these
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Echinoderms and chordates have

Description : Echinoderms and chordates have

Last Answer : Echinoderms and chordates have A. Pseudocoel B. Shizocoelom C. Enterocoelom D. Hemocoel

What is the embryonic characteristic that evolutionarily makes echinoderms proximal to chordates?

Description : What is the embryonic characteristic that evolutionarily makes echinoderms proximal to chordates?

Last Answer : Echinoderms and chordates are deuterostomes, i.e., in their embryonic development the blastopore turns into the anus. All other animals with complete digestive system are protostomes, i. ... digestive tube that appears in the embryonic development. Phylum Echinodermata - Image Diversity: blastopore

The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. The presence of neural integrating centers with concentration of neurons in the brains and the spinal cord (central nervous system, CNS) allowed the increase of the interaction complexity between these animals and the environment. Receptor (afferent conduction) and efferent (motor, regulatory and behavioral reactions) functions come out more sophisticated in chordates due to the presence of more well-developed neural networks. These features have been preserved by evolution as they provide adaptive advantage to their owners.

Description : The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. The presence of neural integrating centers with concentration of ... These features have been preserved by evolution as they provide adaptive advantage to their owners.

Last Answer : How can the tubular-dorsal nervous system in chordates be compared to the nervous pattern present in invertebrates?

Which of the following group of characters is present in all chordates in some or other stage in their life or Chordates differ from nonchordates in h

Description : Which of the following group of characters is present in all chordates in some or other stage in their life or Chordates differ from nonchordates in h

Last Answer : Which of the following group of characters is present in all chordates in some or other stage in ... D. Gill slits, vertebral column, and notochord

Which of the following characters is shared by all chordates at some stage of life ?

Description : Which of the following characters is shared by all chordates at some stage of life ?

Last Answer : Which of the following characters is shared by all chordates at some stage of life ? A. Notochord B. ... C. Pharyngeal gill slits D. All of the above

Which of the following characters is absent in all chordates? (a) Diaphragm (b) Coelom (c) Pharyngeal gill clefts (d) Dorsal nerve cord

Description : Which of the following characters is absent in all chordates? (a) Diaphragm (b) Coelom (c) Pharyngeal gill clefts (d) Dorsal nerve cord

Last Answer : (a) Diaphragm

According to Darwin, the organic evolution is due to (a) competition within closely related species (b) reduced feeding efficiency in one species due to the presence of interfering species (c) intraspecific competition (d) interspecific competition.

Description : According to Darwin, the organic evolution is due to (a) competition within closely related species (b) reduced feeding efficiency in one species due to the presence of interfering species (c) intraspecific competition (d) interspecific competition.

Last Answer : (c) intraspecific competition

Which of the following traits is not characteristics of echinoderms ?

Description : Which of the following traits is not characteristics of echinoderms ?

Last Answer : Which of the following traits is not characteristics of echinoderms ? A. Water vascular system B. Trochophore larva C. Tube feet D. Enterocoel

Which of the following statement is incorrect for echinoderms ?

Description : Which of the following statement is incorrect for echinoderms ?

Last Answer : Which of the following statement is incorrect for echinoderms ? A. The most distinctive feature ... D. They have well- developed circulatory system.

Are echinoderms endothermic?

Description : Are echinoderms endothermic?

Last Answer : Yes

Not all animals have a circulatory system. Poriferans, cnidarians, platyhelminthes and nematodes (in these there are the pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.

Description : Not all animals have a circulatory system. Poriferans, cnidarians, platyhelminthes and nematodes (in these there are the pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.

Last Answer : What is the alternative means for transport of substances in animals without a circulatory system? Why is blood important for larger animals?

Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates. Imagine a scientist is testing the hypothesis that vertebrates evolved from echinoderms. Having as research object a newly found protochordate species, what is an example of a discovery that would weaken the hypothesis? What is an example of a discovery that would strengthen it?

Description : Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates. Imagine a scientist is testing the hypothesis that vertebrates evolved from echinoderms. Having as research object a newly ... the hypothesis? What is an example of a discovery that would strengthen it?

Last Answer : Hypothesis to be tested: Vertebrates evolved from echinoderms. Testing material: A newly found protochordate species (i.e., a vertebrate forerunner). Example of weakening observation (that ... shows how science works, beginning with the placement of hypothesis and further observational testing.)

Echinoderm identity card. How are echinoderms characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Description : Echinoderm identity card. How are echinoderms characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Last Answer : Examples of representing beings: sea cucumber, sea urchin, starfishes. Basic morphology: calcareous endoskeleton with spines, ambulacral system. Type of symmetry: secondary radial. Germ layers and ... cephalization. Types of reproduction: sexual, with larval stage. Phylum Chordata - Study Here

Is there a larval stage in echinoderms?

Description : Is there a larval stage in echinoderms?

Last Answer : In echinoderms embryonic development is indirect, with ciliated larvae.

Do echinoderms present internal or external fecundation? Is there sex division among individuals?

Description : Do echinoderms present internal or external fecundation? Is there sex division among individuals?

Last Answer : The fecundation in echinoderms is external, gametes are liberated in water where fecundation occurs. The majority of echinoderms are dioecious with male and female individuals.

How are the symmetry and the nervous system characterized in echinoderms?

Description : How are the symmetry and the nervous system characterized in echinoderms?

Last Answer : Adult echinoderms, along with cnidarians, are the animals that present radial symmetry, i.e., their body structures are distributed around a center. The radial symmetry in echinoderms however ... to follow the pentaradial structure of the body. Phylum Echinodermata - Image Diversity: radial symmetry

Do echinoderms have an excretory system? How is excretion done in these animals?

Description : Do echinoderms have an excretory system? How is excretion done in these animals?

Last Answer : Echinoderms do not have an excretory system. Their excretions are eliminated by diffusion.

Do echinoderms have respiratory and circulatory systems?

Description : Do echinoderms have respiratory and circulatory systems?

Last Answer : In echinoderms there are not well-defined respiratory (with the exception of the holothurian group) and circulatory systems. The ambulacral hydrovascular system plays the function of these systems.

What is the type of digestive system of echinoderms?

Description : What is the type of digestive system of echinoderms?

Last Answer : Echinoderms present a complete digestive system, with mouth and anus.

What is the system that permits movement and fixation to echinoderms?

Description : What is the system that permits movement and fixation to echinoderms?

Last Answer : The system that permits movement and fixation to substrates in echinoderms is called the ambulacral system. In these animals water enters through a structure called madreporite, passes through ... emptied by water thus acting as suckers. Phylum Echinodermata - Image Diversity: ambulacral system

How can the endoskeleton of echinoderms be characterized in comparison to analogous structures present in vertebrates, arthropods and molluscs?

Description : How can the endoskeleton of echinoderms be characterized in comparison to analogous structures present in vertebrates, arthropods and molluscs?

Last Answer : The echinoderm skeleton is internal, i.e., it is an endoskeleton. It is made of calcium carbonate (calcareous). Vertebrates also have internal skeleton made of bones and cartilages. Arthropods ... of chitin, a chitinous exoskeleton. Some molluscs present a calcareous shell that works as exoskeleton.

What are the basic morphological features of echinoderms?

Description : What are the basic morphological features of echinoderms?

Last Answer : Echinoderms, as the name indicates (echino = spiny, derma = skin), are creatures with spines originated from an endoskeleton. Their endoskeleton is made of calcareous plaques that besides spines ... have pentaradial symmetry; the radial symmetry in these animals is secondary, present only in adults.

Under which environments do echinoderms live?

Description : Under which environments do echinoderms live?

Last Answer : Echinoderms are marine animals, they live in salt water.

The canal system is a characteristic feature of (a) echinoderms (b) sponges (c) helminthes (d) coelenterates.

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Last Answer : (b) sponges

Select the taxon mentioned that represents both marine and fresh water species. (a) Echinoderms (b) Ctenophora (c) Cephalochordata (d) Cnidaria

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Which of the following animals are true coelomates with bilateral symmetry? (a) Adult Echinoderms (b) Aschelminthes (c) Platyhelminthes (d) Annelids

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