The phrase dune erosion by ocean water along a shoreline best describes a density-independent limiting factor that can affect ecosystem stability (Option B).
<h3>What is a density-independent limiting factor?</h3>
A density-independent limiting factor can be defined as any factor in a given ecosystem that may alter the homeostasis of the population that lives in a given geographic area.
These factors (density-independent limiting factors) are generally abiotic factors such as hurricanes, extreme temperature conditions, the presence of contaminants in the air that hamper life in a given area, etc.
Conversely, density-dependent limiting factors are biotic factors such as competitive species that alter the development of another population.
Therefore, with this data, we can see that a density-independent limiting factor is any abiotic condition that may alter the life of a population in a give geographic area and thus alter the homeostasis of the whole ecosystem.
Learn more about density-independent limiting factors here:
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1) Embryonic stem cells can become all cell types of the body because they are pluripotent (that means having the ability to originate almost every type of cell in the body). On the other hand, adult stem cells are more limited and can only differentiate into different cell types of the same tissue. For example, if the tissue is skin, they would differentiate in keratinocytes, melanocytes, etc. We can say that adult stem cells are multipotent because they can become more than one type of cell.
1.1
Advantages of embryonic stem cells:
-They can grow easily in culture
-Originate almost every type of cell in the body with the right stimuli
Advantages of adult stem cells:
-Adult stem cells that come from this patient and then are reintroduced in him are less likely to initiate rejection after transplantation.
- They are present in a lot of tissues/organs: bone marrow, brain, blood vessels, muscle, skin, heart, and many more.
1.2 Disadvantages of embryonic stem cells:
- They are obtained from human embryos and because of that they are destroyed during the process
-There is not enough information obtained to understand this cells completely.
Disadvantages of adult stem cells:
-It's difficult to isolate these cells from the rest of the tissue
It'sts not easy to have a big number of them in cell culture
(these are a problem because it needs to exist large numbers of these cells to be used in replacement therapy for this patient.)
2)
<span>The answer is: During differentiation, certain genes are activated to produce proteins that enable specific functions.
</span>During the differentiation process, some parts of the cell genome will be activated or expressed, while others parts will have it repressed. The part that was activated will lead to translated proteins that will help dictate the shape of the cell as well as their function. This is a process of gene expression and can be activated or repressed by stimuli from the inside or outside of the cell.
3. The answer that BEST explains is Meiosis results in offspring with genotypes that are not exact copies of the parents.
Something that differentiates meiosis from mitosis is the fact that the new cells have different genetic information due to the recombination of genetic material from the parents. This will make the offspring different from the parents. Also, a process that helps mixing the DNA is Crossing over. Crossing over. is an exchange of DNA between homologous chromosomes (half are from the mother and the other half from the father).
Pre operative operative and post operative care.
Different colored bands in each solvent signify the different materials that are found in the substance that is been analysed.
The green band in the solvent represent the green chlorophyll which are found in leaves. Chlorophyll is the substance which gives the plants the capacity to trap energy from the sun for production of food.
