<span>Fish and most reptiles rely on their sense of
touch. Some organisms are able to feel the area that surrounds them. They can
feel pressure, detect current, and detect electrical fields within their surroundings, which
help them navigate and ultimately survive and adapt in their harsh environment. Sharks
are among the most common species of fish that can use electrical fields within
the water to navigate along the water and use it for hunting purposes.</span>
100%, if theres one with all dominant traits, it will always be brown
The phospholipid is arranged into a bilayer, it is a basic structure of all membranes. Each membrane composed of membrane proteins that activate the membrane to carry out its distinctive activities. Some proteins are limits only to the membrane surface, other have one region in membrane and domain on one o both sides of it.
CAPACITY..
Limiting factors determine carrying capacity. The availability of abiotic factors (such as water, oxygen, and space) and biotic factors (such as food) dictates how many organisms can live in an ecosystem. Carrying capacity is also impacted by the availability of decomposers.
BIODIVERSITY...
While food and water supply, habitat space, and competition with other species are some of the limiting factors affecting the carrying capacity of a given environment, in human populations, other variables such as sanitation, diseases, and medical care are also at play.
<span>There are 2 parts to the answer:
1. DNA is very long. It is simply not efficient to translate proteins directly from DNA. We need a messenger to copy the information from the DNA in much more compact, manageable and short molecule, thus mRNA copies the code for a specific protein off the DNA, is exported from the nucleus and is then used as a template to create the protein.
2. Regulation. Having mRNA as an intermediate stage between the coding and the translation of the information into protein, enables fantastic and advanced control.
a. It allows the sequestering of DNA into the nucleus. A tremendous advantage for regulation.
b. It allows regulation on the transcriptional level by transcription factors - when and how much we end up with any specific protein.
c. It enables alternative splicing - again another level of control, and adds options for diversity,
These reasons are why RNA is necessary.</span><span>
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