Many endurance athletes train at high altitudes before a major sporting event. they do this because they think training at high altitudes changes the number of red blood cells in their body. describe an investigation to find out if training at high altitudes change the number of red blood cells in the body. if so what is the control variables

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

Is there any solid scientific evidence that humans have been cloned?

Wich of the following are manual restraint techniques for dogs