Answer:
B:17
Explanation:
The atomic number is always the Proton number.
The lining of the uterus is shed because an ovum has not been fertilized
Answer:
Prophase 1
Explanation:
In prophase 1, homologous chromosomes pair up and exchange sections of DNA in a process called crossing over.
The three most common elements are oxygen, carbon, and hydrogen
XX shows female
XY shows male
answer will be E as it is present on both genes.
