Hypothesis.
A Hypothesis is an estimation of what might happen and the student's observation before moving on to investigate.
R R Rr is the result of 1st punnet square and the genotype used to produce f2
r
r
Brain Ischemia which is definetly fatal as the cells of the cerebrum will start to respire anaerobically and eventually the building up of lactic acid will be fatal
The right answer is vein (it contains blood and has valves).
The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.
