What are the differences between tundra and taiga in regards to soil characteristics

1 answer:

5 0

Tundra soils are formed at high latitudes. It is usually very cold in the tundra. Tundra soils are generally frozen, and are classifed as Gelisols (think Gelato!). In order to be a Gelisol, permafrost needs to be within 100 cm of the soil surface. These soils freeze and thaw a lot, making the soil heave and buckle (cryoturbation), like a mixter does to cookie dough. This creates trees at funny angles , and can generate a lot of building issues.

The soil quality of a taiga biome is very poor. This poor quality is due to the fact that the taiga has such low temperatures for such a long period of time. Fallen leaves and moss can remain on the floor for a long time without decomposing due to the cold, moist climate. This limits their organic contribution to the soil, creating spodosol. This in turn limits the ground coverage of the forest floor.

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If an adult dog has 78 chromosomes the number of chromosomes in a dogs sperm cell will be

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Reproductive cells are haploid (have 1/2 the chromosomes), whereas somatic/body cells are diploid (have the full set of chromosomes)

This makes sense if you think about it. Using the example from the question, every dog has 78 chromosomes. This includes two of each (there are two chromosome 1's, two chromosome 2's, etc. This is visible in the karyotype attached). One set of these chromosomes were inherited from the mother, and one set from the father. Each parent contributed 39 chromosomes (one chromosome 1, one chromosome 2, etc.). If the dog in the question were to have 78 chromosomes in its sperm cells, it would contribute two sets to its offspring. When combined with the chromosomes in the egg cell, the offspring would end up with extra chromosomes. Therefore, both the sperm and the egg cells will have 39 chromosomes, one of each. When combined, they will produce offspring with 78 chromosomes, the proper number.