Answer:
A
Explanation:
First, you need to isolate the DNA from the subjects sample. Second, you need to amplify that DNA with PCR in order to be able to see enough DNA during gel electrophoresis at the end. Third, restriction enzymes are used in order to cut the DNA at specific sites. Fourth, you separate these small fragments using gel electrophoresis. The gel will give you a visual indication of all the fragments present in the subjects sample and thus help you profile the subjects DNA.
According to Weber's law, the size of a just noticeable difference or difference is a constant proportion of the size of the initial stimulus.
Explanation: Weber’s law is a principle that describes that for two stimuli to be perceived as different, the stimuli should differ by a minimum constant percentage and not by a constant amount.
For example: in a noisy room it is required to shout in order to be heard in contrast a whisper can be heard in quiet room. For us to be aware consciously 50% of the time the minimum stimulation required for any stimuli.
The absolute threshold for difference between the two stimuli of any individual may vary and depends on the strength of the signal apart from the experience, alertness, expectation and motivation.
The individual’s difference threshold also known as just noticeable difference is the difference between two stimuli half of the time that we can distinguish.
Answer:
A
Explanation:
Starch, an example of a class of carbohydrates known as polysaccharide is produced in the leaves by photosynthesis and transported to the roots of the plant for storage. Micro-organisms in the surrounding soil feed on starch released into the soil from the root
To increase the novelty of Life.
Darwin’s
research showed that finches beaks are different to fit their food source. It
also started the theories of evolution and natural selection. The
Grant’s research on the Galapagos Islands showed that evolution exists and can
happen over a course of two years. They proved Darwin’s theories are true. Since
all the plants and animals are native to the islands, they had to adapt to the
new food source and climate. Beaks, size, etc. are all changes made to these
organisms to be able to live on the islands.
The Galapagos Islands are located in Ecuador and
sit on the Pacific Ocean. <span>The Galapagos Islands were formed from 3 million
to 5 million years ago. Volcanic eruptions typically shield volcanoes formed
the islands. They are located over a “particularly hot mantel” that causes
volcanic activity. The outcome of many eruptions were islands because the left
overs were pushed to the surface. The Galapagos islands are pretty big reaching
an area of 3,093 miles. The temperatures range from 69 to 84 degrees creating a
typically warm climate. </span>
Darwin studied medicine at age 16, but became
fascinated specimens around the globe. He developed theories of natural
selection and evolution. While he was on the Galapagos islands, he studied
thirteen different species of finches.
He observed finches and different beak
structures. He observed their ability to consume foods such as nuts, bugs, and
fruit. He concluded all were related to their beaks. For example, long, slender
beaks are good to reach in the flowers of a cactus.
<span>Charles concluded that the finches beaks are
examples of adaptive radiation. To fit in the island, they had to adapt to the
conditions. This lead to Charles’ theory of natural selection. </span>
Charles came to the conclusion of evolution and
natural selection. Natural selection is the process where organisms adapt to their environment to survive and
produce more offspring. Evolution is where different kinds of living organisms
are thought to have developed. These theories have changed science forever and
leave today’s scientists marveling of his theories.
I hope this helps:)
