21. B. recessive
22. D. DD and dd
23. D. FF and ff
More consumers than producers
It's hard to understand like only a part of the page. Could you take a picture of the whole page. Thanks.
Although, I'm not sure about the entirety of this question, when reviewing claims and evidence, check your sources to make sure they are reliable.
Nuclear power plants have a rare type of uranium and uranium is a non renewable resource