Answer:
Epithelium
Explanation:
Epithelium are tissue massage found mostly in the skin and serve as protective covering for the internal and external parts of the body.
A major characteristic of the epithelium is that its layers do not contain any blood vessels such as the artery or vein. The surface of the cells is also usually open to the internal cavity of the organ.
Answer:
A dominant trait can be described as the one which masks the effect of a recessive trait. The alleles for a recessive trait gets suppressed by the dominant one.
A punnet square can be described as a diagram which depicts the outcomes of a cross. For single traits, the cross is monohybrid. For studying two traits at a time, a dihybrid cross can be made.
The punnet square for the following Holstein cattle can be shown as:
BP Bp bP bp
BP BBPP BBPp BbPP BbPp
Bp BBPp BBpp BbPp Bbpp
bP BbPP BbPp bbPP bbPp
bp BbPp Bbpp bbPp bbpp
The results show the phenotypic ratio to be 9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned
Fungi is what decomposes things and puts nitrogen back into the ground. without the fungi plants would soon begin to run out of the nutrients they need. lack in vegetation would soon form. animals would then start to die of or migrate to different locations. so eventually you would begin to see less food and more wildlife in town because of the food shortage.
The TYR, TRP2, and TRP1 genes are located next to each other on a single chromosome and are organized into an operon is most likely to be accurate.
The option a is correct.
Explanation:
The genes for the Tyrosinase, TRP2 and TRP1 are located on the same chromosome and are operons. These are operons because they are controlled by same transcription factors on mRNA.
Tyrosinase enzyme is important for the synthesis of melanin, eye pigments and hair colour. The synthesis of all these is completed in three distinct reactions catalysed by TRP1, TRP2 and Tyr genes. These work as operon and the protein product is almost 40% similar of the three genes.
The amount of melanin production depends on tyrosinase enzyme activity of all the three genes.
The genetic regulation is done by operons.
