Some of the major difference in the digestive system of Cnidarians and echinoderm are
Cnidarians have an incomplete digestive system specifically extracellular digestion occur, where enzymes break down the food particles are degraded by enzymes and absorption occur in its gastrovascular cavity.
While in echinoderms, the digestive system may vary depending on types of species and need of their food types.
They use of tube feet to reach to their food sources and move their mouth area toward the food. Their digestive system relatively simple when compare with human.
In Cnidaria only have gastrovascular cavity, diploblastic, presence of stinging cell, Hydrostatic skeleton etc.
In Echinoderm have triploblastic, water vascular system with unique characteristics, calcareous endoskeleton etc.
Echinoderms have no excretory or respiratory systems.
Learn more about echinoderm, here:
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make you a faster
runner.
Independent variable?
Dependent variable?
Answer:
Independent is what youre testing so it should be eating vegetables and fruits. and Dependent is what your outcome should be the dependent variable depends on you IV (independent variables) so the DV should be whether you run faster or not.
Explanation:
b. reed.
C. membrane.
D. sounding board.
If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is
a. 80 degrees.
B. 40 degrees.
C. 90 degrees.
D. 0 degrees.
Phosphorus cycles between living things and the SOIL
Explanation:
Phosphorus flows in a cycle within rocks, water, soil and sediments, and organisms. The phosphorus cycle is the biogeochemical cycle that represents the action of phosphorus within the lithosphere, hydrosphere, and biosphere. Phosphorus is an essential element for all sorts of life. As phosphate (PO4), it delivers up an essential part of the structural core that holds DNA and RNA mutually.
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Phosphorus cycles between living things and the Soil
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mesophytes
xerophytes