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storchak [24]
4 years ago
13

Viral infection will provoke cell mediated immunity but will not activate a humoral response.

Biology
1 answer:
DiKsa [7]4 years ago
8 0
This statement is false. <span> The humoral immune system is one part of the immune system that is activated when pathogens are present in the blood stream or other body fluids. B cells are the main cells involved in the response, and these cells secrete antibodies that seek out and attach to pathogenic molecules. These attached antibodies act as markers, marking the pathogens for destruction by other parts of the immune system.</span>
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Which information is needed to construct a geomagnetic time scale?
AleksAgata [21]

Answer:

the magnetic direction of rocks along the surface of Earth and the age of rocks along the surface of Earth

Explanation:

The earth's magnetic field or geomagnetic field is believed to originate from the movement of molten iron and nickel in the outer core.

During a period in which the earth magnetic field is normal, crystallising magnetic minerals in magma records the orientation of the prevailing geomagnetic field. At other times when the field reverses and the magnetic field orientation changes, magnetic minerals in cooling magma stores this record.

To create a geomagnetic time scale, geologists can assign absolute ages to the records of these paleomagnetic anomalies which are the reversals. The rock is dated using radiometric techniques and each period of reversal is ascribed an absolute geologic age. Therefore, the magnetic direction of rocks along the surface of Earth and the age of rocks along the surface of Earth helps to build the geomagnetic time scale of the earth.

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3 years ago
A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and
beks73 [17]
<span>d. Disk soaked in distilled water

Experimentation is a scientific process wherein you test and verify a hypothesis based on its assumption is going to be supported or negated (null hypothesis). Hence experimentation involves the independent and dependent variable, also control variable as a level in the IV. </span>
8 0
3 years ago
WORTH BRAINLIST!!!!!!!!!!!!!!!!!!!111
Papessa [141]

Answer:

Uncomfortable heat and humidity

Explanation:

After it rains for a long time, the humidity level rises, and most of the time it also brings heat with it.  The author was using the metaphor of the broccoli being dropped into a steamer to explain the heat and humidity outside.

Hope this helps :)

8 0
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STatiana [176]
A

A haploid cell formed in the male seminiferous tubules

The reproductive tissues of male and female humans develop similarly in utero until a low level of the hormone testosterone is released from male gonads. Testosterone causes the undeveloped tissues to differentiate into male sexual organs. Primitive gonads become testes; other tissues produce a penis and scrotum in males.
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How is the information stored within the base sequence of DNA used to determine a cell’s properties?
vovikov84 [41]

Answer:

The genetic material of most of the organism is Dexoxy-ribonucleic acid OR DNA which are formed of the monomer unit called nucleotide. Each nucleotide is composed of a 5-C deoxyribose sugar, a phosphate group and 4 types of nitrogenous bases mainly adenine, cytosine, guanine and thymine.

It is the sequence of these nitrogenous bases which determine the fate of a cell as these nitrogenous bases are read by the ribosome in the form of triplets called codons where each codon codes for specific amino acids. These amino acids bind to each other via peptide bonds to form proteins.

Thus, these nitrogenous bases control the important property of the cell.

6 0
3 years ago
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