« previous next »

Author Question: Which of the following describe(s) echinoderms? A) They have an exoskeleton of h (Read 907 times)

Charlie

  • Hero Member
  • *****
  • Posts: 640
on: Aug 5, 2013
Which of the following describe(s) echinoderms?
A) They have an exoskeleton of hard calcareous plates.
B) Tubefeet provide motility in most species.
C) Digestion occurs completely outside of the organism.
D) Hemolymph circulates in the water vascular system.
E) They are found in both freshwater and saltwater environments.


camila

  • Hero Member
  • *****
  • Posts: 705
Reply #1 on: Aug 8, 2013
Answer has to be B, trust me!


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Charlie

  • Hero Member
  • *****
  • Posts: 640
Reply #2 on: Oct 18, 2013
Wonderful, you were right, thank you so much.


« previous next »
 

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

A shed carapace of a lady crab, part of the hard exoskeleton A shed carapace of a lady crab, part of the hard exoskeleton
How to describe transformations of a sinusoidal function (y=a*sin⁡b(x−c)+d) How to describe transformations of a sinusoidal function (y=a*sin⁡b(x−c)+d)
Describe the development of atherosclerosis, including its role in the risk of heart disease Describe the development of atherosclerosis, including its role in the risk of heart disease
Describe the Conceptual Forecasting Framework in your own words. Describe the Conceptual Forecasting Framework in your own words.
Describe the Conceptual Forecasting Framework in your own words. Describe the Conceptual Forecasting Framework in your own words.
Exoskeleton: Fly Exoskeleton: Fly
Video: How proteins function? How do proteins work?

For a complete list of videos, visit our video library