The blood group B is almost absent in Native Americans, whose ancestors arrived in very small numbers about 10,000 years ago. Which factor is responsible for this phenomenon?

like the stems of plants, the stalks of fungi grow away from the direction of gravitational pull. Which type of reaction is demonstrated by this behaviors?

How do fungus reproduce

Which statement regarding respiration is correct? A) respiration in autotrophic organisms occurs only during the day B) all living organisms carry out some form of respiration C) all autotroph and heterotrophs require glucose and oxygen for

In selective breeding humans influence the course of evolution. what determines the course of evolution in natural selection

A greenhouse is filled with air that contains more carbon dioxide than normal air has how might photosynthesis and plant growth be affected

Balthazar's depression is being treated through a procedure in which electrodes are placed on both sides of his head and a brief current is turned on. the current triggers a seizure that lasts about a minute, causing his body to convulse.

What is relay neuron?

How long did it take for rattlesnakes to adapt without a rattle?

What parts of cells use up most of the oxygen? a, membranes, b. mitochondria, c. nuclei

What is the basis for the shape of the food Guide pyramid?