Cytoplasm streams within a cell, moving material some what of ocean currents move rack. In which sell materials move faster from the cell membrane to the center of the cell? Why?

The lipid components of cellular membranes often include:

Explain how geographical isolation causes speciation.

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What would be the effect on blood flow if some arteries lost their elasticity? A) no affect on blood flow B) increased blood flow because of a more rigid structure C) decreased blood flow due to limiting the amount of blood D) impossible to predict

What are three primary macronutrients elements that plants need in relatively large amounts?

Why can't cellular respiration occur without photosynthesis

A transition from a squirrel to a monkey is seen easily by a. the transition of paws to hands with finger nails and position of the thumb b. the transition to bipedalism c. the tranisition of tails because primates do not have tails d.

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What is the name of the neurotransmitter that excites muscle cells (causes them to contract) ?

What role does a dna play in existence of cell?