Answer:
b. cis test
Explanation:
A test that is used to determine if the mutation associated with a given phenotype is due to mutations in two different genes or due to different alleles of the same gene is called a complementation test.
A complementation test is also called as a cis-trans test.
If the mutations in a complementation test are located on the same position then the genes are termed as being on the cis position otherwise on the trans-position.
A cis test, that is if the genes are located on the same position serves as a control for the complementation test.
Answer: Light Refraction
Explanation:
Light rays travel in straight lines. When they strike an opaque surface, the rays bounce, and light is reflected back to your eye so that you see an image. When light strikes a transparent object, some of the light passes through. If that light strikes the object straight on, it continues to travel in a straight line. If the light enters the transparent object at an angle, though, it changes direction, bending.This bending of light is called refraction. Refraction occurs because light entering an object slows down. When it enters at an angle, one side of the light ray enters before the other, slowing down first.Looking from above, an object under water appears larger than it does in air. It's not that the image the light gave our eyes is bigger. It's that the image is actually closer to our eyes, since the light is not passing straight down, but is instead bending relative to the water's surface. Light passing straight down would be perpendicular to the water's surface, like the vertical line on the letter T.
One reason of decline in honeybees is destruction of habitat with pesticide and global warming this decline in plants has had a direct impact to the decline of honeybees.
<span>The troposphere layer can have thunderstorms
or clear, sunny skies. The biosphere interacts most with this layer. </span>
The stratosphere is the second layer
from Earth's surface. Winds are strong and steady in this layer. <span>
</span>
The mesosphere is heated by the ozone
layer beneath it. This layer is where most meteor showers occur.
The
thermosphere contains the ionosphere and exosphere. It contains layers of
single, unmixed gas.
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</span>
A food web is a system of interlocking and interdependent food chains.
