Answer:
is also known to function in nerve development, fertility, and viability. When human and mouse genes whose protein products closely resemble apterous were used to generate ... [USA] 96: 2165–2170), the apterous mutant phenotype was rescued. ... patterns in the transgenic Drosophila were similar to normal apterous.
Explanation:
It is also known to function in nerve development, fertility, and viability. When human and mouse genes whose protein products closely resemble apterous were used to ... patterns in the transgenic Drosophila were similar to normal apterous. ... for normal wing patterning and growth whereas mutation in the gene (apterous ...is also known to function in nerve development, fertility, and viability. When human and mouse genes whose protein products closely resemble apterous were used to generate ... [USA] 96: 2165–2170), the apterous mutant phenotype was rescued. ... patterns in the transgenic Drosophila were similar to normal apterous.
This zone is called as the zone of aeration. It is present between the earth's surface and the water table, and its main constituents are the soil and rocks. The pores which are present in this zone are partly filled with water, and may mix up with air, causing aeration.
Answer:
C) Weathering and erosion
Explanation:
The completed sentence will be as follows -
The deserts and dunes seen here are created through the process of Weathering and Erosion.
Weathering is defined as the process of breakdown of rocks, soil and minerals into small particles under the influence of atmosphere, water and also biological organisms to some extent. The products of weathering are found at same place as the original rock with little or no movement.
In erosion, the materials such as rocks and soil or dissolved materials are transported from one place to the another place by the action of wind or water flow. So, here displacement of substances takes place.
For radioactive materials with short half-lives, you use a very sensitive calibrated detector to measure how many counts per second it is producing. Then using the exact same set up you do the same at a latter time. You use the two readings and the time between them to determine the half-life. You don’t have to wait exactly a half-life, you can do the math with any significant time difference. Also, you don’t need to know the absolute radioactivity, as long as the set up is the same you only need to know fraction by which it changed.
For radioactive materials with long half-lives that won’t work. Instead you approach the problem differently. You precisely measure the mass of a very pure sample of the radioactive material. You can use that to calculate the number of atoms in the sample. Then you put the sample in a counter that is calibrated to determine the absolute number of disintegrations happening in a given time. Now you know how many of them are disintegrating every second. You use the following equations:
Decays per Second = (Number of Atoms) x (Decay Constant)
Half-life = (Natural Log of 2) / (Decay Constant)
And you can calculate the half-life
Hope it helps :)
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Answer:
Mechanically - By the action of a force.
Electrically - By an electrical current.
By radiation - By Light waves or Sound waves.
By heating - By conduction, convection or radiation.
Explanation:
