In the family tree below, people with the recessive trait of attached earlobes
are shaded gray.

What is true about the person labeled "A"?

 D) it is a female with two recessive alleles

Explanation:

Since the shape is a circle, we know it is a female. Since the shape is shaded, we know the posses the recessive trait, meaning they must have two of it's alleles.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.