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kramer
3 years ago
6

What is a substance that provides the host immunity by introducing a weakene (attenuated) or killed (inactive) version of a viru

s?
Biology
2 answers:
CaHeK987 [17]3 years ago
6 0
A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response.
nexus9112 [7]3 years ago
3 0

Answer:

Vaccines are the substance that provides immunity to the body by introducing a weak or dead virus.

Explanation:

Vaccines are not the medicines which helps in the prevention of disease in animals. Vaccine contains weak or dead microorganisms when injected in our body. Our body makes antibodies according to the structure of microbes which are injected. So whenever, the microbes enter into the body, our body is prepare for it. So the microbes cause no or less damage to the body.

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Trypsin is an enzyme that hydrolyzes(1)______________ into smaller subunits called(2)________________. the gelatin contained thi
Wittaler [7]

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<span>Steapsin is also an enzyme in pancreatic juice or is a pancreatic lipase called triacylglycerol lipase. It catalyzes the breakdown of fats. It is an enzyme that hydrolyzes (3)fats into smaller sub-units called (4)fatty acids & (5)glycerol. Phenol red is a pH indicator that can determine the presence of acids. It is a color indicator that turns turns (6)yellow in the presence of acid.</span>

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4 0
4 years ago
Describe and explain how blood flows from the foot to the lungs.
Natali5045456 [20]

Answer:

lungs:

The blood first enters the right atrium.

The blood then flows through the tricuspid valve into the right ventricle.

When the heart beats, the ventricle pushes blood through the pulmonic valve into the pulmonary artery.

The pulmonary artery carries blood to the lungs where it “picks up” oxygen.

It then leaves the lungs to return to the heart through the pulmonary vein.

The blood enters the left atrium.

It drops through the mitral valve into the left ventricle.

The left ventricle then pumps blood through the aortic valve and into the aorta. The aorta is the artery that feeds the rest of the body through a system of blood vessels.

Blood returns to the heart from the body via two large blood vessels called the superior vena cava and the inferior vena cava. This blood carries little oxygen, as it is returning from the body where oxygen was used.

The vena cavas pump blood into the right atrium and the cycle begins all over again.

6 0
2 years ago
Quién propuso el primer mecanismo de herencia a partir de la observación y la experimentación con plantas?
marusya05 [52]

Answer:

Gregor Mendel

Explanation:

Gregor Mendel fue un naturalista, biogista y matemático que demostró por primera vez los principios de la herencia utilizando su trabajo sobre las plantas de guisantes.

Publicó su trabajo en "Experiments in Plant Hybridization" en el año 1866. Al controlar la polinización, Mendel pudo cruzar plantas de guisantes con diferentes formas de rasgos. En el primer conjunto de experimentos de Mendel, experimentó con solo una característica a la vez. Los resultados de este conjunto de experimentos llevaron a la primera ley de herencia de Mendel llamada ley de segregación (Bio Libretexts).

7 0
3 years ago
How do animals use dunes to survive
Xelga [282]
Animals like a kangaroo rat has natrul defenses that help itself while living in the dune
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4 years ago
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Which parent do sons inherit recessive , sex linked trait from ? Mother or father?
Sloan [31]
Father because you inherit traits from your mother and recessive sex linked traits from your father.

4 0
4 years ago
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