Answer:
Cell membranes serve as barriers and gatekeepers. ... Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly. On the other hand, cell membranes restrict diffusion of highly charged molecules, such as ions, and large molecules, such as sugars and amino acids.
Explanation:
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<span>It takes years to become widely understood if it is misrepresented in order to influence public opinion
It is the only one with bad effects since the others may be annoying but they would provide safety.
</span><span>Im not leaning either way with this but global warming is not agreed on and many people will try to use that to influence people as an example </span><span />
Phenotypes, Genotypes, and Traits from Parents represented into offspring.
There are many different types of cancer, each caused by different factors is the statement which best explains why cancer is so difficult to cure.
The option D is correct.
Explanation:
Cancer is an abnormal growth of cells in which the check on the cell cycle and programmed cell death ceases.
The mutation in the genes or DNA causes cell to divide profusely overpowering the check points of the cell division.
The cancer in particular cell is no longer at a single cell but it metastasizes to other organs and building its own capillaries to get nutrition.It gets difficult to treat the disease as many organs get affected.
Cancer is caused by lifestyle, mutation, carcinogens, eating habits, genetic factors or age related etc.
There are different strategies required to treat and prevent the cancers caused by different factors. So not one factor can be taken for the treatment purpose. Different organs affected with cancer require different line of treatment so it gets difficult to apply same strategy for everyone.
The question given here is not complete, there is no example of biotechnology give. In this condition any example can be taken here, plant biotechnology is taken as an example.
Answer: The plant biotechnology can be defined as a field that helps in agriculture. The plants and crops are modified in such a way that the crops produced are of great importance.
Explanation:
The example is genetically modified plants. The genes of the plants is modified in such a way the products produced are disease resistant, drought resistant and have high nutritive value.
These crops are not naturally present in the environment it is produced by the genetic manipulation which is the work of plant biotechnology.
There are many disadvantages associated with this techniques such as horizontal gene transfer, loss of insects, and the long term effect of these plants cannot be predicted.
