In a study in which college students are given herbal memory supplements to see if this will improve their scores in their psychology course, what is the independent variable?

Whether the students were given the memory supplements or not

Explanation:

An independent variable is the variable that the experiment manipulates ,changes or controls hence it will have a direct effect on a dependent. variable. The dependent variable is the variable that is affected and it can be measured.

Independent and dependent variables have a cause and effect relationship.

Whether a student is given the herbal memory supplement is the independent variable since that is the variable that can be controlled.

The students next text scores will be the dependent variable.

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.