In aquatic organisms, these are the respiratory organ for the extraction of oxygen from water and for the excretion of carbon dioxide.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

if you know your abc's you should be able to get your answer or just use google

not always but somethings can be reproduced in a laboratory.

because photosynthesis could not occur (apex)