Question

Which of the echinoderm classes is characterized by most regionalized digestive tract? Include explanation please a.)...

Which of the echinoderm classes is characterized by most regionalized digestive tract? Include explanation please

a.) Stelleroidea (Wrong answer)

b.) Holothuroidea

c.) Echinoidea

d.) Crinoidea

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a)Stelleroidea has a more differentiated digestive system consisting of a buccal cavity,eosphagus,stomach and an anal vent .However the arrangement is not recoginalized .

b)Holothuroidea digestive tract consists of seven parts and is covered by the epithelial tissues and also has junctions.It consist of the mouth,pharynx,eosophagus,stomach ,cloacal chambers and anal vent .The distribution is highly regionalised in Holothuroidea

c)In Echinoidea the digestive tract just consist of coiled tunes having opening for the mouth and anal cavity .Hence it is not regionalised.

d) In Crinoidea only consist of a one way of a not very regionalised gut system.Hence this option is not right

Hence from the above explanation option b is the right answer

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Which of the following carries glucose from digestive tract to liver? (a) pulmonary vein (b) hepatic...
Which of the following carries glucose from digestive tract to liver? (a) pulmonary vein (b) hepatic artery (c) hepatic portal vein (d) none of these.
In digestive tract of mammals, water absorption occurs primarily in the ____, where countercurrent exchange of...
In digestive tract of mammals, water absorption occurs primarily in the ____, where countercurrent exchange of NaCl between the ____ in the villi helps keep osmotic pressure high. This example illustrates that this colligative property, namely osmotic pressure, is important in the digestive system as well as the excretory and circulatory systems with which is it often more closely associated A. jejunum; lacteals B. colon; lacteals C. colon; capillaries D. jejunum; capillaries
in which part of the digestive tract does absorption mostly occur? Mammal testes hang outside the...
in which part of the digestive tract does absorption mostly occur? Mammal testes hang outside the body. This is necessary why?
Factors which enhance calcium absorption from the GI tract include: a. vitamin D b. lactose c....
Factors which enhance calcium absorption from the GI tract include: a. vitamin D b. lactose c. protein d. a and b e. b and c
Which one of the following statements is true? Please provide a short explanation for the answer...
Which one of the following statements is true? Please provide a short explanation for the answer chosen. A. evolution of a characteristic has never been observed B. continental drift (plate tectonics) is a poorly supported theory C. punctuated equilibrium contradicts most of Darwin's theory D. the way evolution and fossilization occurs predicts there should be gaps in the fossil record
PLEASE Include Explanation Read the scenario and pick the most appropriate nonparametric statistical test (assume several...
PLEASE Include Explanation Read the scenario and pick the most appropriate nonparametric statistical test (assume several assumptions of parametric tests were violated). Imagine that marketing researchers working for a food company want to determine whether children would prefer ketchup of a different color. They develop green and blue to compare to their standard red (all taste the same). They have children taste all three colors of ketchups (a correlated-groups design) and rank each on a scale of 1 – 10....
The authority function of a self-regulatory organization is most likely characterized by: A. Creation and enforcement...
The authority function of a self-regulatory organization is most likely characterized by: A. Creation and enforcement of its own policies B. The effective management of conflicts of interest C. Establishment of clear standards of conduct D. Quick resolution of disputes
1) a) What kind of cells control peristalsis in the digestive smooth muscle?___________________________________ b) Tell me...
1) a) What kind of cells control peristalsis in the digestive smooth muscle?___________________________________ b) Tell me about the small intestine – the different sections, their specific names, and at least 2 functions of each. Section Specific name Functions 1 – by stomach 2 3 c) Beginning at the mouth, fill out the chart with the appropriate and SPECIFC names of either the enzyme, macromolecule, or location that the enzyme works.    Enzyme What does it digest? Where along the GI tract...
Which of the following is the most likely explanation for an unfavorable direct materials quantity variance?...
Which of the following is the most likely explanation for an unfavorable direct materials quantity variance? a. The new purchasing agent was not as effective in negotiating low prices. b. They used higher quality direct materials, which reduced waste (scrap). c. The government levied new tariffs on the materials purchased. d. Lack of training meant that employees made more mistakes than expected.
Which statement is wrong? (a) The atomic weight of carbon is about 12. (b) The most...
Which statement is wrong? (a) The atomic weight of carbon is about 12. (b) The most stable ion of lithium is Li+. (c) A phosphorus atom is larger than an antimony atom. (d) The radius of a sodium atom is larger than that of a sodium cation. (e) Oxygen has a less negative electron affinity than fluorine. I KNOW THAT THE CORRECT ANSWER IS C AND I SEE WHY IT IS C... BUT CAN YOU PLEASE EXPLAIN TO ME THE...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT