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Feliz [49]
3 years ago
5

Can your body make antibiotics for pathogens that you have never been in contact with ?

Biology
1 answer:
pentagon [3]3 years ago
8 0
Yes. A person comes across many colds in a year or a life time and produces antibodies for each. Babies get many colds in the first years and fewer as they <span>get older because they have made antibodies.</span>
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List three examples of daily activities that affect homeostasis.
Tcecarenko [31]
<span>The three daily activities that affect homeostasis include;
Temperature, glucose levels, ability lymphatic system.
 Homeostasis is the tendency of organisms to auto-regulate and also maintain an internal environment within a stable state. The stable condition is when the optimal functioning of organisms and dependant on many variables.
 For example, fluid balance and body temperature to be kept within certain preset limits. PH of extracellular fluid, potassium, calcium ions and concentration of sodium and blood sugar levels are also variables.
 It is needed to be regulated despite the diet, environment, level of activities. They are controlled by homeostatic mechanisms which when comes together maintains life.</span>
5 0
3 years ago
Read 2 more answers
Scientists have observed that when air pollution is significantly reduced, the frequency of the melanic form of peppered moths:_
zhenek [66]

Answer:

The correct answer is : decreases

Explanation:

The development of the peppered moth is a transformative event of directional color change in the moth populace as a result of air contamination during the Industrial Revolution.

The melanic or dark color type of the peppered moth was not known before pollution level was low before 1811. Hence the decrease in pollution level in atmosphere will lowers the frequency of the melanic form of peppered moths.

Thus, the correct answer is : decreases.

4 0
3 years ago
What is true about a prokaryotic cell
natima [27]

Answer: they DO NOT have a nucleus, the don’t have a nuclear membrane. They DO have DNA, nuclear material, a cell membrane. Prokaryotes are less advanced than eukaryotes.

Explanation:

7 0
3 years ago
Why do vertebrate embryos show similarities between organisms that do not appear in the adults?
yKpoI14uk [10]

It is believed that this happens because some signals that regulate development are the same between different species and because <span>they share ancient genes. </span>These ancient genes are expressed during a middle "phylotypic stage" of embryonic development for all species.

For example,  human and animal embryos go through very similar stages of early development and share similar features such as tails and gill-like structures. The major difference appears to be how long it takes to reach each of these same stages.

3 0
3 years ago
A complex culture in which large numbers of human beings share common elements
Kobotan [32]

Answer:

a

Explanation:

6 0
3 years ago
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