On a karyotype, which pair(s) of chromosomes are always the sex chromosomes (no matter what the organism is)? A. the 23rd pair B. the last pair C. the first pair D. all of them

What is one reason why transpiration is important in plants? question 19 options: it produces food from the sugar in the plant cells. it enables the flow of water out of the plant. it produces carbon dioxide in the leaves of the plant.