Answer:
Proportion of the F2 male with red eyes and forked bristle will be 1/4
Explanation:
forked bristles are caused by an allele (Xf) that is X linked and recessive to an allele for normal bristles (X+).
Brown eyes are caused by an allele (b) that is autosomal and recessive to an allele for red eyes (b+)
A female fly that is homozygous for normal bristles and red eyes mates with a male fly that has forked bristles and brown eyes
X+X+b+b+ x Xfbb
the F1 gives 1/2X+Xf 1/2b+b
1/2X+Y 1/2b+b
intercross of F1
Proportion of the F2 male with red eyes and forked bristle will be
forked bristle= Xfy = 1/2 and for red eyes 2/4= 1/2 = 1/2x1/2 =1/4
All of the choices in some ways gave rise to the early civilizations. Mountains helped India to be protected from China, the ocean helped for food, the Sahara desert protected lower Africa from invasion for many centuries. Rivers also helped since they were a major trade routes and the most fertile soil. I think that the Rivers were the most important geographic feature. So the correct answer is C.
Exergonic is the term in the passage that is most likely be used only in a scientific context.
<u>Explanation:</u>
The term Exergonic is used in a scientific context in the given passage. The chemical reactions takes place either absorbing or releasing energy to its environment in which the reactions takes place. This is due to the breaking or the formation of chemical bonds. It mainly depends on the bond's strength.
When energy is given to the environment in which it takes place then it is called as exoergonic reaction. This occurs due to high strength of the chemical bond that is formed. When energy is absorbed from the environment in which the reaction takes place, it is known as endergonic. The bond that is formed will be weaker and not stronger.
Cholesterol makes up cell membranes and is used to create hormones.
Cell membranes are the outer covering of the cell that protect it from the outer environment. A cell membrane is a bilayer of lipid, composed of protein and cholesterol as well. The cholesterol is essential to maintain the proper integrity of the cell membrane.
Hormones are the chemical messengers that are released at one site and they perform their function at another location of the body. Hormones can be made up of several macromolecules like polypeptides, amine acids or cholesterol. The example of hormones made up of cholesterol are: glucocorticoids, mineralocorticoids, and sex hormones.
To know more about hormones, here
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Cells need a source of energy, they get this energy by breaking down food molecules to release, the stored chemical energy.
