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marusya05 [52]
3 years ago
13

What is an echinoderm with long spines?

Biology
1 answer:
alukav5142 [94]3 years ago
7 0

The echinoderm with long spines belongs to the class Echinoidea which includes sea urchins, heart urchins, cake urchins and sand dollars. This spine serves as their protective mechanism from predators. The spines are joined to the skeleton and muscles surround it. The muscles enable them to swivel its spines from predators.

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you may have read about alkaline diets that claim that you need to only eat alkaline foods in order to remain healthy according
hram777 [196]

Answer:

Mechanisms are activated where it is sought to lower the amount of free protons in the blood, that is, to reduce acidity, these mechanisms work between two large systems, the receptor system, the respiratory system and the renal system.

Explanation:

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On the other hand, the digestive system together with the sensory system, will warn this proprioception of the acidity of the plasma and will promote the dilution of these acids with a solvent, which is water, promoting the sensation of thirst.

Finally, the kidneys will seek to retain all the alkaline solutes to neutralize the physiological internal pH, and will release through the urine and the channels of acidic compounds, the products or acid metabolites to the external environment, that is, acid urine excretion.

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3 years ago
Plants are ?
denpristay [2]
Hi there!

Plants are primary producers.

Hope this helps :D
8 0
3 years ago
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Readme [11.4K]

Answer: A

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Without gravitational force Moon would move in

Linear path.

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3 years ago
Differentiate between a plant cell and a prokaryotic cell
Nat2105 [25]
<h2>Plant cell:-</h2>
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<h2>Prokaryotic cell:-</h2>
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  • prokaryotic cell don't have any thick covering of wall or membrane.
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3 years ago
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