A non-energy requiring process that moves materials across a cell membrane with the concentration gradient.

What makes platelet?

In dogs, the color black is dominant to white and follows the rules of simple Mendelian inheritance. What would be the phenotype ratio of a heterozygous black dog was crossed with a white dog?

What is the frequency of initial disturbance in Primary Succession and in Secondary Succession? Also what is the Severity of initial disturbance in the both.

One of the most distinctive marks of deaf culture is:

How many photosystems can be found in a prokaryotic cell

Temperatrure diffrences between the equator abd the two poles produce A:convection currents in the mantle B: Convection currents in the atmosphere C:the coriolis effect B:The green house effect

Mature eggs first begin to be released from the ovaries of human females a short time after the onset of

Which structure is found in all eukaryotic cells? chloroplast mitochondria cell wall pili

Phylogenetic trees are also called what

For a charge to flow through, a current, it needs___. A. Height B. Speed C. Energy D. Heat