If you are going from a high gradient to a low gradient it’s passive transport. Think of a hill if you put a rock at the top of that hill it will go down no energy involved. Active transport is going up the hill you must use energy to push that rock up the hill because it’s from a low gradient to the top. Hope this helps
Well If You Removed All The Plants From A Food Chain Then The Plant Would Either Adapt To New Changes And Thrive if You Move it Or If It Goes Extinct Then Well It Of Course Won't Survive And All Herbivores That Eat That Plant Would Either Have To Adapt And Find A New Food Source Or They Would Starve And Die And That Would Leave The Carnivores To Have To Leave Or Start Find New Prey Or They Too Will Die.
Answer:
Large particles are too heavy, and the wind doesn't have enough energy to carry them.
Explanation:
So, recessive allele 'd' are dwarfs.
The dominant allele is 'D' determines tall.
All you have to do is try to cross the alleles together to get either a homozygous or heterozygous remain. So, you should be able to get Dd or DD.