Polycythemia is a disease which causes an excessive number of red blood cells to be produced.
The disease is the result of a faulty gene. How would the flow of blood be affected by this
condition?
•Blood flow rate will increase.
•Blood viscosity will decrease.
•Blood pressure will increase.
•Blood volume will decrease.

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

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