Answer:
Animals are made up of eukaryotic cells, meaning they have a nucleus which contains the DNA. :)
An experiment or survey must be controlled in order to receive accurate results.
In an experimental group, the independent variable is changed. But in the control group, the independent variable stays the same.
Answer:
The basic repeating unit of nucleic acids are known as nucleotides. A nucleotide consists of three distinct chemical groups, a 5-carbon sugar (ribose or deoxyribose), a nitrogen-rich base - (cytosine (C), guanine (G), adenine (A), thymine (T) in DNA or uracil (U) instead of T (in RNA), and phosphate.
Answer:
I believe the answer is A.
<em>I apologize if I'm incorrect, please let me know if I am tough I'm pretty sure I'm right.</em>
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Percentage of human sperm cells carry an X chromosome is C 50%