The cuticle, cortex, and medulla are regions of the hair, can you describe how they are arranged?

Biology

1 answer:

Hatshy [7]3 years ago

4 0

Answer:

The cuticle is the hair's outer most layer which has shingle or scale like cells that overlap. ... The middle structure includes the cortex which provides strength, color and texture of the hair. The innermost structure is the medulla layer which is only present in large thick hairs.

Explanation:

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Why was it important for Miller and Urey to sterilized the apparatus to kill any bacteria in it?

valentina_108 [34]

Answer:

Having bacteria would produce organic molecules and defeat the whole purpose of the experiment which is to make organic molecules from inorganic molecules. The experiment was supposed to demonstrate the formation of the first organic molecules that initiated life on primordial earth. It is believed that lightning powered the formation of the first simple amino acids, like glycine, from the primordial atmosphere which was mainly composed of carbon dioxide and methane.

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Assume that in cattle a spotted coat is dominant to an even coat, short horns are dominant to long horns, and the traits for coa

kow [346]

Answer:

C. 1/4

Explanation:

Let's assume that the allele for the spotted coat is "S" and the one for the even coat is "s". The allele "L" gives short horns while the recessive allele "l" imparts long horns. The genotype of the cattle heterozygous for both traits would be SsLl. A cross between two heterozygous cattle would produce progeny in following phenotype ratio=

9 spotted coat and short horns: 3 even coat and short horns: 3 spotted coat and long horns: 1 even coat and long horns.

Therefore, the proportion of the progeny with long horns = 4/16= 1/4