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tester [92]
3 years ago
9

Shamona, a pregnant mother in Flint, Michigan, is concerned about the drinking water, which shows high levels of lead. Shamona s

hould know that high levels of prenatal lead exposure are related to __________." facial abnormalities and heart defects defects of the genitals and urinary tract low birth weight and brain damage a variety of childhood cancers
Biology
1 answer:
STatiana [176]3 years ago
6 0

Answer:

Option (3).

Explanation:

Teratogens may be defined as the chemicals that can cause birth defects in the fetus. Substances like alcohol, lead and nicotine acts as the main agents of tertaogens.

Shamona is drinking water that contains high level of lead. The element lead is harmful for the fetus. Even the small concentration of lead is enough to cause birth defects. The lead exposure can cause the abnormal development of brain and damages the brain of fetus. The fetus has low birth weight also.

Thus, the correct answer is option (3).

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Hemophilia is a sex-linked recessive trait in humans. If a father and a son are both hemophiliacs, but the mother is normal, her
saul85 [17]

Answer: XHXh (Note: the H's are superscripts.)

Explanation:

Hemophilia is a sex-linked recessive trait which means that the males having one altered copy of the gene is enough to cause the medical condition( as they have only one X chromosomes and females have two)

In this case the genotype of father and son is such that they are affected by hemophilia.The son has mother's X chromosome and father's Y chromosome.

XhY is the genotype of father and son. As mother would be heterozygous because she is not affected, her genotype will be XHXh.

7 0
3 years ago
The bones of the arms, legs, pelvis, and shoulder area
crimeas [40]
The bones of your arms are called humerus, while your forearms are composed of two bones, the radius and ulna. The bones of your fingers are called metacarpals and each one of those small bones are called phalanges.

The bones of your shoulders are composed of the clavicle, the bony part seen just right under the neck. Part of the shoulder area is the scapula, which is located at the back part of the body attached to the upper part of the ribs. They are the triangle-shaped bones you feel when you cross your arms at the back. 

The bones of your thighs are called femur, they are the largest bones in your body. While the bones of your legs are called tibia and fibula. The bones of your toes are called tarsals and each are composed of smaller bones called metatarsals. Your heels also have bones and they are called calcaneus.

The bones of your pelvis are called Coxal bones as a whole but they are composed of the illium (biggest part of your hips); the pubic bone, located along the reproductive organ; the sacrum and coccyx all located at the base of the spine. 
8 0
3 years ago
The trait which is hidden by the dominant allele in a heterozygous individual is said to be a ___________ trait.
gulaghasi [49]
The answer is B. recessive trait
4 0
3 years ago
Please can anyone help me out in this whole definition actually I can't understand it ​
FrozenT [24]

Answer: Capillaries are tiny branched blood vessels that joins the arteries to the veins

Explanation:

Capillaries are found in the junctions between arteries and veins in the tissues.

They have the following functions:

- They have tiny walls and are tiny enough to penetrate to all parts of the body

- The thin walls help them diffuse oxygen, nutrients and waste products between cells and the blood.

6 0
3 years ago
The spikes on pollen grains probably
Viefleur [7K]

Answer:

<h3>a) allow pollen grain to stick to insect</h3>
6 0
3 years ago
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