<span><span>
Jellyfish are found in every
ocean of the world. They are even found in some freshwater lakes and
ponds.[6]
</span><span>
Jellyfish range from the size of
a thimble or the eraser tip of pencil to approximately eight feet in
diameter with tentacles that reach 200 feet. That is as long as two blue
whales.[1]
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Each jellyfish tentacle is armed
with thousands of cells called cnidoblasts. Inside the cnidoblasts are
nematocysts, each of which contains a coiled stinging thread. When a
fish or other object becomes tangled in the tentacles, the pressure
inside the nematocysts causes the venomous threads to uncoil like a
spring-loaded harpoon</span></span>
1. Knowing the pH value of something determines the acidic level of something and if it is safe to drink.
2. Salt can be form combining acids and bases for the combination of both forms a neutralization reaction creating an ionic compound. Salt can be used in the form of fertilizers, in medicaments such as potassium chloride, for alimentary purposes like sodium chloride, etc.
Hope it helped!
，对不起？ answer is volcanism
<span>A nerve impulse is an electrical signal that travels along an axon. There is an electrical difference between the inside of the axon and its surroundings, like a tiny battery. When the nerve is activated, there is a sudden change in the voltage across the wall of the axon, caused by the movement of ions in and out of the neuron. This triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse. Does this help you?</span>
The ribosomes makes proteins using coded instructions that come from the nucleus
