<span>1.
double helix model was proposed after getting the clue from chargaff rule
purines = pyramidines
2.
A = T ( this means A pairs with T)
G = C (this means G pairs with C)
A DNA strand with the sequence A-T-T-G-C-T is T-A-A-C-G-A
3.
In all the species the nucleic acid is made of phosphate , sugar , nitrogenous base (A,T,C,G)
only the number purines and pyrimidines vary.</span>
The average male American mens height is 177 cm, which is 69.7 inches, which is approximately 5 foot – 10 inches tall. (for white males*). A height chart for men of "White" race/ethnicity*, showing average height changes with age. (hint: 5 feet tall is 60 inches or 152 centimeters.
Explanation:
females have the set XX and males have XY
Iajshsjajsnbshsjsnshhsjs c
Answer:
your answer is b cells are white blood cells that work by producing antibodies, whereas t cells attack foreign invaders directly.
Explanation:
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