The probability of having a widows peak is "50%
You should avoid eating large amount of SATURATED FATS.
Saturated fats are those fats which chemically are made up of single bonds. This type of fat can be found in food such as animal fat, [for instance, butter, cheese, cream etc.], whole meat dairy product and fatty meats, coconut oil, palm kernel oil, etc.
Saturated fats are bad for the heart because it can raise the amount of LDL cholesterol in the blood thus increasing the risk of heart diseases.
The third one is the right answer.
Mutations appear randomly and these mutations can either have possitive, negative or neutral impact on the individual's survival. The environment of the individual amongst other factor determine the net effect of the mutation. For example:
A mutation on a shade plant for bigger leaves would have a possitive impact on the plants survival due to the increase of the photosynthetic tissue area. On the other hand the same mutation on a desert plant would have a negative impact on the plant's survival due to the increase of the leaf area which leads to increased water evaporation off the plant.
Nucleoid
Is the answer for this