B) It is a fluid mosaic model, with proteins interspaced in the phospholipids, both of which can freely move laterally.
Explanation:
The fluid mosaic model proposed by Singer and Nicolson describes the plasma membrane’s structure as a mosaic pattern of components consisting of phospholipids, proteins, cholesterol, and carbohydrates; all of which provides the unique fluid character of the membrane.
According to this model, the phospholipids constitute the main fabric, cholesterol attaches between the phospholipids in between the layers, integral proteins embedded within the bilayers of the phospholipids, peripheral proteins along the peripheries of the layers and carbohydrates outside the membranous layers.
You could do a short story about a man who leaves his home full of energy and ready to go ( like oxinated blood leaving the hart) and the farther he walks away from is home the less energy he has. when he don with his walk he goes home to rest ( deoxinated blood going back to the hart) when he gets home he goes to his home he goes to the refrigerator and gets some food ( deoxinated blood goes to lungs) and the goes to bed to do the same thing later
Answer:
Man' s genotype= Bb
Children's genotype= Bb, Bb and bb for the three children
Explanation:
The gene involved here is that coding for eye color in humans. The allele for brown eyes (B) is dominant over that of blue eyes (b) i.e. brown eyes allele (B) will mask the expression blue eyes allele (b) in an heterozygous state.
A brown-eyed man is crossed with a blue-eyed woman (bb). The woman will be homozygous recessive since the recessive trait can only be expressed in a homologous state. They produce 2 brown-eyed offsprings and 1 blue-eyed offspring.
Note that, for the man who possess the dominant trait (brown eyes), he can either possess a homozygous or heterozygous genotype. Since he produced a recessive phenotyped (blue eyes) offspring when crossed with a blue-eyed woman, it means he donated a recessive allele (b) which combined with that of the woman. Hence, the man has a heterozygous genotype (Bb).
Having known the man's genotype, a cross (see attached image) between Bb and bb will produce four possible offsprings; 2 will be heterozygous brown-eyed (Bb) while the other two will be homozygous blue-eyed (bb).
Since two of their children were brown-eyed, they will have a (Bb) genotype while the blue-eyed child will have a (bb) genotype.
The system is open.
An open system is one where mass is able to flow in and out of the system. The mass entering this system is the water that is added to the fish tank, and the leaving mass is the waste that is generated.
The primary advantage of using this system is that the quality of the water supplied to the fish may be maintained, meaning the fish are healthy and do not have to live in waste, as they would have to if the system was closed.