Calcium provides strength as a element, though it is present as calcium chloride on the exoskeletons.
        
             
        
        
        
<h2><u>Answer:</u></h2>
The recreation center is adjoining the Colorado River, 4 miles (6 km) north of Moab, Utah. In excess of 2,000 common sandstone curves are situated in the recreation center, including the notable Delicate Arch, just as an assortment of one of a kind land assets and developments. 
A characteristic curve, regular scaffold, or (less usually) shake curve is a characteristic shake development where a curve has framed with an opening underneath. Regular curves ordinarily shape where inland bluffs, waterfront precipices, blades or stacks are liable to disintegration from the ocean, streams or enduring (subaerial forms).
 
        
        
        
Answer:
adaptation-the inherited characteristic that increases an organism's chance of survival and to reproduce.
fitness -the ability of an organism to survive and reproduce in its environment
 
        
             
        
        
        
Answer:
Generation of an action potential in the neuron. 
Stimulation of Ca2+ entry into the neuron
Release of acetylcholine into the synapse
Depolarization of the muscle fiber membrane
Explanation:
The following events takes place in the vertebrate neuromuscular junction
a) Nerve Action Potential - Action potential reaches the axon terminal 
b) Entry of calcium ion - The calcium ion reaches the axon terminal and enter into the presynaptic terminus after which the Synaptic vesicles fuse with the membrane of axon terminal
c) Releasing of Arch Quanta - Acetylcholine is released into synaptic cleft which then  binds to the receptor sites on motor end plate 
d) The  Na+/K+ channels opens and Motor end plate becomes depolarized.