Answer: B. Closed
In a closed circulatory system is the one in which the blood is circulated to all the parts of the body of the organism through vessels of different length and width. In this system the blood is pumped from the heart through blood vessels where it is transported to different organs and cells of the body instead of filling up the body cavity.
That would be C
I hope this helped you.
The correct answer is A. Lac repressor.
Lac repressor prevents lac gene which are found in the DNA of Escherichia Coli from being expressed for many times.
Lac repressor is termed as DNA which binds proteins. It allows the expression of genes from coding which are made for proteins to be involved in metabolism of lactose which is in bacteria.
When there is no lactose which is available in the cell, then the genes are being repressed. Lactose are being converted to allolactose if they are available.
Answer:
2:2
Explanation:
<em>The genotypic ratio of expected of their offspring would be 2</em><em>:2</em><em>.</em>
From the illustration, the genotype of the man with male pattern baldness is while the genotype of the woman without the baldness allele is .
Crossing the two genotypes in marriage:
x
Progeny:
<em>Hence, the genotypic ratio of the offspring becomes:</em>
2:2