A student is blood type A. His father was type A his mother was type Explain whether or not the student needs a genetic test to determine whet genotype is AA or , and provide reasoning to justify your answer.

11. gene12. allele13. crossing over14. linked15. gene16. x17. males, femalesapologies if numbers are out of order.

Ais cytoplasmb is cell membranec is ribosomesd is dnaur welcome and can i pls have brainliest?

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.