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adoni [48]
2 years ago
5

What is the purpose of vaccines?

Biology
2 answers:
kondaur [170]2 years ago
5 0
To help your immune system prepare for diseases
vovangra [49]2 years ago
4 0
1 one is correct i am 100% sure i am right
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Waters ____ makes it excellent solvent for salts like sodium chloride as well as other substances required by cells to carry out
valentinak56 [21]

The right answer is polarity.

In chemistry, polarity is a characteristic describing the distribution of negative and positive charges in a dipole. The polarity of a bond or a molecule is due to the difference in electronegativity between the chemical elements that compose it, the differences in charge that it induces, and to their distribution in space. The more the charges are distributed asymmetrically, the more a bond or molecule will be polar, and conversely, if the charges are distributed in a completely symmetrical manner, it will be apolar, that is to say non-polar.

Polarity and its consequences (van der Waals forces, hydrogen bonding) affect a number of physical characteristics (surface tension, melting point, boiling point, solubility) or chemical (reactivity).

Many very common molecules are polar, such as sucrose, a common form of sugar. The sugars, in general, have many oxygen-hydrogen bonds (hydroxyl group -OH) and are generally very polar. Water is another example of a polar molecule, which allows polar molecules to be generally soluble in water. Two polar substances are very soluble between them as well as between two apolar molecules thanks to Van der Waals interactions.

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3 years ago
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The shape of the cell changes in_______
LiRa [457]

Answer:

Its Euglena

Explanation:

Shape change from normal elongated egg-shape to round-shape in stressful environment. These shape changes attain two transition phases. The I-transition phase is reversible where the organism can return to normal if favourable environment persists.

5 0
3 years ago
Which of the following is a possible function of a protein??
Zielflug [23.3K]
Proteins function as builders and give energy repair and reproduce muscle etc ...
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Chromosomes are strands of dna wound around some proteins called
madam [21]
The proteins are called Histone proteins. Chromosomal DNA is packaged such that the strands of DNA are wound around histone proteins and fold into complex ways to form chromosomes. The histone proteins are positively charged proteins that strongly adhere to negatively charged DNA and form complexes called nucleosomes. Each nucleosome is composed of double-helical DNA wrapped. 
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3 years ago
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------------is a life-threatening disease, characterized by high blood pressure that may afflict women late in the second or ear
Galina-37 [17]

Answer:

The correct answer is- Preeclampsia

Explanation:

Preeclampsia is a complication during pregnancy which is characterized by high blood pressure in the pregnant woman and damage to internal organs like liver and kidney.

This complication starts normally after 20 weeks of the pregnancy. Before starting preeclampsia the pregnant woman's blood pressure is normal. Preeclampsia can lead to serious complications if it untreated and the delivery of the baby is the most effective treatment.  

Therefore preeclampsia is a life-threatening disease, characterized by high blood pressure in pregnant women.

6 0
3 years ago
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