This happens because taproot formation is impossible, so trees developed shallow root beds.
Permafrost is soil that has a temperature below 0 °C (for about two years) and forms a solid matrix which can extend to a depth of hundreds of meters. Because of this structure the permafrost prevents trees from developing deep root systems. As a consequence, the shallow root bed of trees such as black spruce, causes them to lean or even fall.
In serial or tandem staging<span> schemes, the first </span>stage<span> is at the bottom and is usually the largest, the </span>second stage<span> and subsequent upper </span>stages<span> are above it, usually decreasing in size. In parallel </span>staging<span> schemes solid or liquid </span>rocket<span> boosters are used to assist with lift-off.</span>
In identical twins, alleles are identical and the order of the bases on the interior of the DNA molecule is identical (Options C and E). It is because genetic material is identical.
<h3>What are identical twins?</h3>
Identical twins refer to individuals produced by the same zygote cell, i.e., they are monozygotic twins.
Since these individuals are produced by the same zygote cell, their genetic material (DNA) will be identical.
Identical twins are useful to understand the exact role of genetics and environment in a given phenotypic trait.
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<span>ectoderm and endoderm theres only two layers</span>
