If a mother's____________ cell contains mutated DNA, this mutation can be passed to her offspring. Which of the following options correctly completes the sentence above?
A. somatic
B. white blood
C. germ.
D. Stem
The correct answer is c. germ. If a mother's germ cell contains mutated DNA, this mutation can be passed to her offspring. Germ cells are the reproductive cells (eggs in females and sperm in males) that carry genetic information from one generation to the next.
a. Somatic cells are all the other cells in the body that are not germ cells. Mutations in somatic cells are not passed on to offspring.
b.White blood cells are a type of somatic cell that plays a role in the immune system.
d. Stem cells are undifferentiated cells that have the ability to develop into different types of cells in the
body.
Therefore, the Correct Answer is C.
More Questions on TEAS 7 Science
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Q #1: Emphysema caused by damage to alveoli from toxins and pollutants is likely to result in the body having difficulty performing which of the following actions?
A. Releasing histamine and acetylcholine
B. Exchanging oxygen and carbon dioxide
C. Absorbing food
D. Producing enzymes
Answer Explanation
Emphysema is a lung condition that is caused by damage to the alveoli, the tiny air sacs in the lungs where gas exchange occurs. When the alveoli are damaged, the body has difficulty exchanging oxygen and carbon dioxide. This can lead to shortness of breath and other respiratory problems. The other options are not directly related to the function of the alveoli or the effects of emphysema.
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Q #2: How many times stronger is the hydrogen-ion concentration of a pH 4 solution as compared with a pH 9 solution?
A. 0.00001
B. 5
C. 100,000
D. 50
Answer Explanation
The correct answer is c. 100,000. The pH scale is a logarithmic scale, which means that each change of one pH unit represents a tenfold change in the hydrogen-ion concentration. A pH 4 solution has a hydrogen-ion concentration that is 10^5 (or 100,000) times greater than that of a pH 9 solution.
a. 0.00001 is the hydrogen-ion concentration of a pH 9 solution as compared with a pH 4 solution.
b. 5 is the difference in pH units between a pH 4 solution and a pH 9 solution.
d. 50 is not the correct answer.
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Q #3: Which of the following layers of skin lack blood vessels?
A. Papillary
B. Epidermis
C. Reticular
D. Hypodermis
Answer Explanation
The layer of skin that lacks blood vessels is the epidermis. The epidermis is the thin outer layer of the skin and does not have any blood vessels within it. It is composed of keratinized, stratified squamous epithelium and is made of four or five layers of epithelial cells, depending on its location in the body.
The other options are not correct because they do contain blood vessels. The papillary layer is part of the dermis, which contains blood vessels. The reticular layer is also part of the dermis and contains blood vessels . The hypodermis is a layer below the dermis and also contains blood vessels.
