Which of these is measured when one gets their blood pressure checked? the force of blood against artery walls as the patient's heart
contracts and relaxes
the number of times per minute the patient's heart contracts during
rest
O
the volume of blood entering the patient's heart between
contractions
the amount of blood flowing through the patient's blood vessels

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos