(a) Describe the first interaction that triggers signaling to begin in a target cell.

a signal molecule locks to a receptor protein (like lock and key),causes shape change in receptor then creates a specific reaction inside the cell that eventually triggers the cell response. State where signal receptors may be located in target cells.

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.

they kick it to the curb.

explanation:

that current was nasty.