Abdominal organ that filters erythrocytes and activates lymphocytes. True or False

Which of the following types of muscle fibers are best adapted for prolonged contraction such as standing all day? A) uninucleated fibers B) striated fibers C) fast fibers D) slow fibers E) intermediate fibers

When non-nerve cells become involved in response to signals which type of receptors goes into action

What are possible side effects that pollution of watersheds would have on Virginia's economy? Virginia's fishing docks would close down. Virginia's wildlife would need to find new habitats. Virginia's habitants may have an increase in health care.

How should meniscus be used when measuring the volume of water in a graduated cylinder

Which characteristic is used to divide aquatic biomes into three zones?

What is an atom in the human body

Explain the process that creates wind?

What type of food molecules make up lettuce

The theory of endosymbiosis suggests that the ancestors of mitochondria were A) formed due an error in cytokinesis. B) once free-living heterotrophic prokaryotic cells. C) parasitic cells that lived within more complex organisms.

Wat biotic and abiotic factors control viral activity in the sea