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mr_godi [17]
3 years ago
6

8. Although vaccines cannot be used to treat a person who is sick, they can help to prevent

Biology
2 answers:
LiRa [457]3 years ago
8 0

Answer:

antibodies to a disease bacterium

Explanation:

svetlana [45]3 years ago
3 0

Answer:

Live, inactive virus

Explanation:

they are injected with a live and inactive virus, so our antibodies can fight them. hope this helps!

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If air pressure is getting lower what would happen to torricelli's mercury barometer?
Tcecarenko [31]
It will get lower since the pressure around the barometer gets lower

7 0
3 years ago
An operon is controlled by a repressor. When the repressor binds to a small molecule, it binds to DNA near the operon. The opero
larisa [96]

Answer:

Negatively repressible.

Explanation:

A control which occurs through repressor is known as negative control which may be inducible or repressible.

When a small molecule named as allolactose binds this repressor it leads to allosteric repulsion which removes repressor from the operator as a result of which RNA polymerase can start transcription. Allolactose is therefore known as inducer because it induces lac operon expression.

But here, the operator is active (induced) already so there is no need to induce the operon which means that it can only be repressed so that transcription could stop. So the answer is negatively repressible operon.

6 0
3 years ago
Which phase of mitosis is shown in the diagram
Lorico [155]

If there's this picture in the question, the right answer is metaphase.

A metaphase qualifies a phase of meiosis or mitosis (following prophase and preceding anaphase) during which chromosomes, or at least kinetochores, align with the equatorial plate of the spindle. At this stage, chromosomes are at their maximum condensation and karyotypes are usually established. In the first division of meiosis, the metaphase represents the phase during which meiotic analysis is usually accomplished.


3 0
3 years ago
Read 2 more answers
Help me please,Thanks
BigorU [14]
Okay. About 71% of the Earth's surface is water. And salt water holds about 96.5% of all the Earth's water. The remaining 3% of freshwater is found in Glaciers and ice caps making it difficult to use because it is frozen. Other places freshwater can be found is: Lakes, swamps, rivers and the atmosphere. I hope this helps!
8 0
3 years ago
Carbon and hydrogen have similar electronegativities and combine together to form hydrocarbon molecules. What type of bonds form
egoroff_w [7]
The type of bond formed between carbon and hydrogen is NON POLAR COVALENT BOND.
Covalent bond involves sharing of atoms between two elements; each element will donate electrons which will be equally shared by the elements involved. In the case of carbon and hydrogen, carbon has four electrons in its outermost shell, therefore it will form a covalent bond with four atoms of hydrogen each of which will donate one electron.
7 0
3 years ago
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