Answer:
if a molecule is too large it cannot pass. also it depends on the concentration of a specific substance inside the cell. similarly, if a molecule is polar it cannot penetrate the phospholipid bilayer.
there are proteins that work as channels and pumps that allow these molecules to pass
Explanation:
Http://groups.molbiosci.northwestern.edu/holmgren/Glossary/Definitions/Def-C/chrom_theory_inheritanc.... <span>The theory that chromosomes are linear sequences of genes. The unifying theory stating that inheritance patterns may be generally explained by assuming that genes are located in specific sites on chromosomes.
</span>
A person would have to consider Harriet' s upbringing in that time and imagine all the wrong doing she has seen regarding her parents care; therefore, witnessing her own care as a slave as well. It's no wonder that eventually, one would desire they're own true freedom.
Answer:
Deforestation negatively impacts the <u>carbon cycle</u> as <u>trees</u> play an important role in <u>balancing the amount of carbon in the atmosphere</u>.
Explanation:
Deforestation is one of the most damaging activities to the environment due to different reasons but mainly because it releases important amounts of carbon dioxide to the atmosphere due to the logging and burning of forests and also leads to the reduction of fauna populations because of habitat destruction.
In this case, cutting white and red pines and then setting a pine acreage on fire disrupts the carbon cycle because:
a) [As stated above] <u>Trees play an important role in balancing the amount of carbon dioxide (CO2) in the atmosphere</u><u> as there is less photosynthesis carried out by plants - important part of the carbon cycle.</u>
b) <u>When </u><u>trees (wood) are burned, the carbon that was formerly stored is released into the atmosphere as CO2,</u> leading to another disruption in the carbon cycle.