Look at your R-R ratio, depending on the time segment attributed to each square you can then do the math and find time between waves, then find the number of R waves in minute
Superfetation is when a second child is conceived during pregnancy. This cause the <span>embryos to rise and it gives each a different age while still in the uterus. It's basically like when to twins are conceived, just at different times.
- Marlon Nunez</span>
Answer:
Diaphragms
C. Create a physical and chemical barrier to sperm.
Answer:
option B
Explanation:
see, as much I know, apart from the seperate functions of both B cells and T cells in our immune system, T cells help out B cells in antibodies production. And those T cells are Helper T cells.
keep your promise please... it would be my first brainly!
You make friends by socializing, talk to people, tell them who you are.
Hope this helped :)
