Diffusion can involve water, and what else?

According to freud, two instincts furnish the energy for personality functioning. these instincts are

Why are decomposers such as bacteria important to an ecosystem's food web? They recover nutrients from dead matter and waste. They feed the primary producers. They take in energy from inorganic compounds. They provide nutrition directly to consumers.

A 9-year-old child who has cerebral palsy and scoliosis also is mentally challenged and blind. the child is incontinent, has contractures of the elbows and wrists, and sits in a customized wheelchair most of the day.

Is a scientist who studies plant remains in the archaeological record. a. ethnologist b. zooarchaeologist c. paleoethnobotanist d. paleontologist?

How does the human body maintain homeostasis regarding temputure?

Which statements describe functions of antibodies? Check all that apply. They maintain the cell's shape. They regulate cell processes. They protect the body from infectious agents. They signal the immune system to destroy pathogens.

Which event results in massive flooding? a landslide an earthquake a tornado a tsunami

What three kinds of variations among organisms did Darwin observe during his voyage?

What general trends characterized the evolution of Homo cranial morphology? a) increasing cranial capacity and more oval-shaped crania through time b) decreasing cranial capacity and more oval-shaped crania through time c) increasing cranial

Explain what process the a cell must use to allow a protein to enter and why?