I believe that the best answer among the choices provided by the question is <span>D) A study by Dr. Birde showed that the number of songbirds in her yard increased due to a modified food source.</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
Answer:
T A G C A C T
Explanation:
Adenine (A) and Thymine (T) are base-pairs, alongside Cytosine (C) and Guanine (G). Only A - T or G - C are base-pairs in DNA strands, you will never see Adenine (A) and Cytosine (C) together in a DNA or RNA strand.
the more the better and depends on what cell you need
<span>The net pressure gradient in the cardiovascular system is created by ventricular contraction.
Hope this helps! :)
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I can help you with that, hfnj2013! :3 The cytoskeleton is responsible for the support structure and movement of cells in your body. Hope that helps!!! XP