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stellarik [79]
3 years ago
11

A (n) _______________ is an injection of weakened or dead viruses or bacteria, or pieces of proteins from weakened or dead virus

es or bacteria. It is given to help the immune system of people "learn" how to defeat the real virus or bacteria. A) antibiotic B) antibody C) pathogen D) vaccine
Biology
2 answers:
N76 [4]3 years ago
8 0

the answer is

D). Vaccine

Yanka [14]3 years ago
4 0
I believe it’s D. Vaccine
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Dysfunctional breathing results in an increase in the activity level of which of the following secondary respiratory muscles
xxMikexx [17]

Answer:

Answer is A. Scalene.

Explanation:

Dysfunctional breathing is a breathing disorder , which is characterized by changes in breathing pattern. It can also be described as an alteration in normal breathing.

The scalene are muscles which are found at the neck, and act as accessory muscle of respiration.

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Which statement is true about nitrogen and oxygen?
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B, They are both made of protons, neurons, and electrons

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Nitrogen and oxygen are both gases at normal warmth and pressure. They are more both elements. They both dissolve at a really cold temperature.

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They're both diatomic gases.

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The spelling is the only difference 

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When did Homo sapiens first evolve
vlabodo [156]

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300,000 years ago

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Angelina_Jolie [31]

Answer:

It consists of the mouth, or oral cavity, with its teeth, for grinding the food, and its tongue, which serves to knead food and mix it with saliva; the throat, or pharynx; the esophagus; the stomach; the small intestine, consisting of the duodenum, the jejunum, and the ileum; and the large intestine, consisting of the cecum, a closed-end sac connecting with the ileum, the ascending colon, the transverse colon, the descending colon, and the sigmoid colon, which terminates in the rectum. Glands contributing digestive juices include the salivary glands, the gastric glands in the stomach lining, the pancreas, and the liver and its adjuncts—the gallbladder and bile ducts. All of these organs and glands contribute to the physical and chemical breaking down of ingested food and to the eventual elimination of nondigestible wastes.

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