There are actually 2 requirements for karst topography to form.
Carbonate rock (limestone, and dolomite) and slightly acidic water
Slightly acidic water will seep into cracks and slowly dissolve the carbonate rock. it will form caverns, sinkholes, disappearing streams and other karst features.
Hope this helped :)
The uterus of rat are small while that of humans are big
C. Water, the 3 states of matter are
Solid
Liquid
Gas
and Plasma can TECHNICALLY be the fourth. Just plain 'Water' is not one of them
In addition to endocrine glands, some organs whose functions are primarily nonendocrine also produce hormones. these endocrine tissues include heart and kidneys.
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The heart can act as an endocrine organ by releasing natriuretic peptides that lower the blood pressure. Those are an A-type natriuretic peptide (ANP) from the from stretched atria and B-type natriuretic peptide (BNP) from the ventricles.</span>
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The kidney secretes two hormones: erythropoietin (EPO) which increase the production of red blood cells and calcitriol (active vitamin D3) which promotes the absorption of Ca and its release from the bones.</span>
