The cell theory is fundamental to all living things.
Are you asking for DNA or chromosomes or something? You asked for which of the following but then dont give the following
I believe that 2 is correct. :)
Asexual And Sexual is the correct answer
Carbon dioxide is transported in the blood in three ways: (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Source: https://academic.oup.com/bjaed/article/5/6/207/331369