What is the body’s first line of defense?

Biology

1 answer:

Hoochie [10]3 years ago

3 0

Answer:

The first line of defence includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.

Explanation:

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The mammoth, which was very hairy, and the elephant, are both thought to have evolved from a scantily haired ancestor. Explain,

Leona [35]

Answer:

Evolution occurs about 6 million years ago.

Explanation:

The mammoth evolved from the common ancestor because evolution occurs about 6 million years ago. The modern elephants and woolly mammoths share a common ancestor and they are split into two separate species about 6 million years ago due to change in genetics as well as environment that leads to the evolution in the elephants.

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3 years ago

A gene that masks the expression of a second gene is

Furkat [3]

The answer is that the gene is dominant

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Regression analysis is:

Ksivusya [100]

Answer: Option A.

Explanation:

Regression analysis is a statistical model for estimating the relationships among different variables.

Regression analysis helps to predict the value of the dependent variable which changes when any one of independent variables varies, while other independent variables remain fixed.

Generally Regression analysis are classified in linear and non-linear regression.

Hence, the correct option is A.

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3 years ago

What is the problem which fermentation is able to FIX?

WARRIOR [948]

Answer:

<u>Cell has a limited supply of NAD+</u>

Explanation:

Cellular respiration occurs in the cytoplasm, where glucose is broken down for energy processing. Energy is produced by aerobic respiration in the presence of oxygen, whereas anaerobic respiration can be carried out in an oxygen-deprived environment.

Fermentation is one kind of anaerobic respiration- here, the cells use glucose to generate a Net 2 molecules of ATP from the 6carbon sugar. Glucose is first converted to pyruvate, which is oxidized in a complex process. While 4 ATP are produced in fermentation, 2ATP are used in regenerating NAD+ from NADH2.

Two types of fermentation include lactic acid fermentation and alcoholic fermentation. These occur in single-celled, and multicellular microbes.

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3 years ago

Can someone please help me ..

Law Incorporation [45]

Is there a word bank?

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