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Artyom0805 [142]
3 years ago
5

Explain why the lower respiratory tract is essentially sterile.

Biology
1 answer:
Gemiola [76]3 years ago
7 0

Answer:

The lower respiratory tract is essentially sterile because epithelium lining is the respiratory tract that covers the bottom respiratory tract sterile. It basically prevented the mucus accumulation in lungs. The macrophages is the immune system part that can digest or inhaled any harmful substances.

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6. Members of the kingdom "Protista" are classified
AnnyKZ [126]

Answer:

C.

Explanation:

Domain is above Kingdom, so it cannot be A or B. Protista is a Kingdom, so it cannot be D. Therefore it must be C.

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During which phases of mitosis are sister chromatids attached to each other?<br><br> Plzz Help Me
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Prophase and Metaphase

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Microorganisms that may live either in the presence or absence of oxygen but prefer its presence, are called
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6 0
3 years ago
Question 1
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1- greenhouse gasses cause the greenhouse effect and make the planet warmer throughout the entire world. 2- A 3- A 4- taken in 5- (need the answer choices) 6-? 7- the carbon cycle is important because it circulates oxygen and CO2 throughout the atmosphere so that plants and animals can exist because of the other.
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The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on the X chromosome in humans. A
babunello [35]

Answer:

1/2 , no difference to the fraction of the sons

Explanation:

Since the disorder is inherited recessive gene on the X. The woman will be a carrier since her father had G6PD. Therefore her genotype is X Xh

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Therefore 1 out of the 2 sons(1/2) will have the disorder

If the father had the disorder, it will not change the fraction of the sons  because the disorder is on the X chromosome. However one of the daughters will have it XhXh

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