Acombination of the 7-repeat allele of the drd4 vntr gene and the 5-httlpr gene has been found to result in a(n) temperament in 6-month-old infants.

Difficult temperament.

Explanation:

Difficult temperament in children is a situation where by a child shows characteristic features such as withdrawal, negative mood, high intensity, low regularity.

Raising children with difficult temperament can be very difficult, starting from infancy, such babies cry a lot, very hard and loudly, they are not easily soothe, they are difficult to get to sleep or even to stay asleep. They are also referred to as colic or high needs babies. One major way to deal with children who have difficult temperament is by not being emotional and instinctive in responding to them, the temperament of such children should be studied, and also their behaviour should not be taken personally.

c

explanation:

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic