Why Does a Cactus Have Spines?
Why Does a Cactus Have Spines? First, let’s look at the spines of cactus for what they really are – the main part of cactus often functions as a modified...
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Why Do Pine Trees Stay Green All Year Long?
Why Do Pine Trees Stay Green All Year Long? A pine tree remains green throughout the year because it doesn’t lose all its leaves at one time. Trees that remain...
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What Is Soil?
Soil is a mixture of very small pieces of rock and rotted materials from plants and animals. This rotting plant and animal material, called humus, gives soil its dark...
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What Gives Yellow Mustard Its Bright Coloring?
What Gives Yellow Mustard Its Bright Coloring? Bright yellow mustard you’re familiar with starts out as tiny seeds that are white, brown, or black. Those tiny...
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Why Do Plants Have Sap?
Why Do Plants Have Sap? Sap is the liquid that enables trees and other plants to live and grow. The roots of a plant draw water, along with dissolved minerals, from the...
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