<span>The answer is a certain required chemicals must be actively
transported. Blood brain barrier is a
selective membrane that separates blood circulating from the brain and the
fluid of extracellular in the central nervous system. This is also called a
filtering mechanism, the capillaries that carry blood to the brain and spinal
cord tissue blocking the path way of the certain substance.</span>
Ten times as much. Did the eagle eat the duck?
<span>What did Jean-Baptiste Lamarck believe about traits such as large muscles that are acquired during one's lifetime?
</span><span>They can be passed on to offspring.
</span>
<span>Jean-Baptiste Lamarck proposed that organisms have an innate tendency toward complexity and perfection.</span>
Question number 2 the dna the answer is number 4 the last one
Answer:
hope you like it
Explanation:
An abiotic factor is a non-living part of an ecosystem that shapes its environment. In a terrestrial ecosystem, examples might include temperature, light, and water. In a marine ecosystem, abiotic factors would include salinity and ocean currents. Abiotic and biotic factors work together to create a unique ecosystem.
