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Archy [21]
3 years ago
12

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.
Biology
1 answer:
Law Incorporation [45]3 years ago
5 0
<span>vaccine The wording given is pretty much the exact definition of a vaccine. The key to how a vaccine works is that it provides to the immune system, samples of the surface proteins of the infectious materials. With those samples available, the immune system is able to produce antibodies that react to those proteins.</span>
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John is a smoker. he has at least doubled risk of which mental disorder?
Dafna11 [192]
<span>Schizophrenia This is a mental disorder characterised by failure to understand what is real and abnormal social behaviour . Studies across 20 countries have shown a strong link between smoking and schizophrenia .</span>
5 0
3 years ago
The daughter cells are genetically different from the parent cell and from each other. False True
mash [69]

Answer:

False

Explanation:

They are genetically identical to the parent cells, but different from eachother.

7 0
3 years ago
.pls help fast <br> Is the fossil record complete for humpback whales? Explain your answer.
bezimeni [28]

Answer:People look at the fossil record and think the early history of many animals is filled with giants, but not for whales. It's only in recent geological times that whales have achieved really large sizes

8 0
2 years ago
Read 2 more answers
What is the role of your kidneys in compensating for low levels of oxygen
TEA [102]

Explanation:

When there are low oxygen levels in blood, the blood pH tends to lower. This is because there is an increased level of carbon dioxide in the blood that is converted to carbonic acid by carbonic anhydrase. When carbon acid dissociates, into H⁺ and HCO₃⁻ . The H⁺ influences the increase in acidity of the blood.   The kidneys will excrete most of the H⁺ and retain most of the HCO₃⁻ to help maintain the right blood pH. However, most of blood pH homeostasis is maintained largely by the lungs.

Learn More:

For more on function of kidneys check out;

brainly.com/question/1285333

brainly.com/question/909694

#LearnWithBrainly

4 0
3 years ago
In most vertebrate neurons, an action potential arrives at the axon terminal and causes the release of chemical messenger molecu
erik [133]

The correct answer is option d, that is, neurotransmitters.  

A neurotransmitter refers to a chemical component, which is discharged at the terminal of a nerve fiber by the introduction of a nerve impulse, and by diffusing across the junction or synapse. It helps in the transfer of the impulse to another muscle fiber, nerve fiber, or some other composition. Acetylcholine is a kind of neurotransmitter, that is, used by neurons in the CNS and the PNS in the control of activities ranging from heart rate and muscle contraction to digestion and memory.  


5 0
3 years ago
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