How are decomposers important in the food web of an ecosystem? they break down organic molecules back to basic nutrients
they are the only organism that can consume a tertiary consumer
the provide the most energy for the ecosystem
they are usually at the start of the food web

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

What is the primary goal of human communities?

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping