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Butoxors [25]
3 years ago
5

One of the three lines of defense against pathogens is ________?

Biology
1 answer:
stepladder [879]3 years ago
5 0

Answer:

one of the three lines of defense against pathogens is surface barriers that prevent the entry of pathogens into the body.

Explanation:if its right pls mark brainliest

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2 QUESTIONS!!!!!! ( USE A TRANSLATOR)
lawyer [7]

Answer:

Both 1 and 2 are Latin.

Explanation:

The translator detected Latin.

In English, they translate to:

1. Now answer this question below.

2. How are you doing today?

hope this helps :)

6 0
2 years ago
Read 2 more answers
The structure of the spinal cord can be described as (1) composed of thirty-one segments (2) having a cervical enlargement, lumb
AlladinOne [14]

Answer:

(1)

Explanation:

there are different divisions of the spinal cord but as a whole there are 31 segments

3 0
3 years ago
Name the animal used as a beast of burden in the andes
satela [25.4K]

Answer;

The llama and the alpaca were used as beasts of burden in the Andes.

Explanation;

-A beast of burden is drought animal that carries or pulls heavy loads, such as a donkey, mule, llama, camel etc.  

-The Andean animal used as a beast of burden is an Alpaca and the Llamas. They are docile, fluffy animals that can withstand the cold of the mountains. As such, they make excellent work animals.

-Male llamas have been been used as beasts of burden in the Peruvian and Bolivian Andes ranges for more than 4000 years.

8 0
3 years ago
What were the two driving forces that drove the evolution in the variation of skin color
yarga [219]

Answer:

The correct answer is: geography and UV radiation.

Explanation:

Skin variation occurred thanks to evolution, and was driven as a consequence of the geographical location of different populations of humans.

The humans that lived in hot and sunny places, closer to the equator, where much more exposed to the sun's ultraviolet radiation. In order to survive the amount of UV lights that they were exposed to, new humans in those regions were being born with a darker skin tone, which was rich in melanin (a brown pigment that protects us from the sun radiation).

Contrary to these humans that lived in the tropical areas, the humans that populated the areas that were closer to the poles, developed much lighter skin as a result of lower amounts of melanin in their skin. Since sun exposure in the poles is very limited, humans needed to receive as much as they could for the production of Vitamin D, and thus, their skins got lighter and less protected.

8 0
4 years ago
E is a dominant allele for wet earwax and e is a recessive allele for dry earwax. if two individuals with the phenotype of wet e
MrRissso [65]
Given 
E dominant allele for wet
e recessive allele for dry

that means
for phenotype wet, the possible genotypes are EE, or Ee, and
for phenotype dry, the only possible genotype is ee.

Therefore we also know that the child who has dry earwax has genotype ee.
Since the child inherits one allele from each parent, therefore each parent must have a recessive allele "e".

If both parents have phenotype wet earwax, they both must be heterozygous for wet/dry earwax, namely Ee.

8 0
3 years ago
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