Answer:
c po he he shell fish po sagot
21. B. recessive
22. D. DD and dd
23. D. FF and ff
We study sexual anatomy to better understand the process of reproduction in humans. It also can help us better understand how a majority of animals reproduce, and how it can influence ecosystems. I hope this helps, and please mark as Brainliest answer!!
When the sea floor spreads or collides it creates breakages which would be ocean ridges and deep sea trenches
