The lungs expand and with that you breathe in air as the diaphram contracts and relaxs to cause "breathing"
Answer:
takes in carbon dioxide, puts out oxygen
Explanation:
Answer:
Rr x rr
Explanation:
Let's say
RR is a tall plant.
Rr is tall
& rr is a small plant
The only genotypes you can get to make two tall and two short is if you use a hetero pair and a same ressesive (rr) genes.
