Answer:
A) the diameter of the helix
Explanation:
This is was measured during the 3D structure of DNA proposed by James Waston and Francis Crick in 1953. The x-ray diffraction showed crossed shape of the X-ray films.The DNA appeared as two double strands structure.
The diameter of the DNA double helix is 20 Armstrong.
This diameter is constant because of the complementary pairing of bases.( purines with pyrimidines)
I think its c i could be wrong though
A) 12 is the answer because sex cells have half as many chromosomes as the offspring will have, half from the mother, the other half from the father.
Imagine a very tiny person is walking through the auditory tract, from the ear canal through to the auditory nerve. when that tiny person reaches the cochlea and walks along the basilar membrane, Loud frequency sounds will disturb their walk most at the base of the cochlea, and soft frequency sounds will disturb their walk most at the tip of the cochlea, the cochlea communicates with the middle ear by two holes closed by membranes: the oval window, which limits the base of the vestibular ramp and on which the abutment is attached and the round window that closes the base of the tympanic ramp and which serves as a decompression system.
Explanation:
Reaction equation:
A + B → AB
This kind of chemical reaction is called a combination or synthesis reaction. In such reactions, two species combines to form the product(s).
In a typical chemical reaction, species on the left hand side are called reactants.
Those on the right hand side are the products,
In the reaction; A + B → AB
A and B are the reactants; they are the species combining
AB is the product of the reaction on the right hand side.
Learn more:
Chemical equation brainly.com/question/5247791
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