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Vikki [24]
3 years ago
8

Can you help me with this question please.

Biology
2 answers:
Neporo4naja [7]3 years ago
5 0
Hydrogen bonds would be the right answer
larisa86 [58]3 years ago
4 0

Answer:

Option A, Hydrogen bonds

Explanation:

Hydrogen bond between the bases holds the two strands of double helix together. There are four base namely Adenine (A), Cytosine(C), Guanine (G) and Thymine (T) which forms complementary base pairs.

There are two base pairs – A = T and C = G which are bonded by hydrogen bonds which can be easily broken for DNA replication.  

Hence, option A is correct.

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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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The correct answer is B.
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Through which foramen do axons of motor neurons of the glossopharyngeal nerve pass through?
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