which type of transport is the transport of materials along a concentration gradient from high to low concentrations? A. active transport B. vesicle transport C. passive transport D. all of the above.

What is the difference between an observation and a inference

Layer around every cell that separates it from the outside environment; it controls what can enter and leave the cell. → cholesterol True False

James Chadwick's primary discovery was the

Which of the following is an example of how a changing environment is important for the sustainability of living systems? A. The water cycle ensures that water used by one organism will be available for another organism in the future. B.

The largest species in kingdom protista belongs to what supergroup?

What kingdom do eubacteria and eukaryotes belong to?

Bacteriophages are bacteria that engulf and destroy viruses

What important role do fungi play in the environment

N males, which of the following organ performs a dual function of ejaculation of sperm and voiding of urine?

Men do not have all ___ in their testes at birth.