What is depicted in this figure? What are the two organisms that compose this structure?
Which organism is labeled B?
Define the type of symbiosis shown and explain how it works in the structure shown in the figure?
What forms a similar relationship with certain fungi, called mycorrhizae? What does the fungus do?

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.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

This is collection of data made by comparing objects in standard units. in science, the units are metric.