Solution:
A frame of reference is also a system of lines and clocks that you can use to measure the position and motion of a set of objects and events in relation to each other.
It is a system of geometric axes in relation to which measurements of size, position, or motion can be made.
It might seem strange to use a coordinate system moving relative to the earth. But, for instance, the frame of reference moving along with a train might be far more convenient for describing things happening inside the train. It is particularly important when describing an object's displacement.
If the position of any one at a point O then he has a set of coordinate axes to measure the position of a body. x.y.z in units in meter. So he locates the point as x meters along x-axis , y meters long y-axis and z meters along z axis. along z axis.
These three axes are perpendicular to each other then are called orthogonal axes or frame of reference. The time of an event can be measured by a clock.
The frame is said to be attached to the observer…as his scale of measurement is his own.
By this statement that he found a body P at (x,y,z) he is locating the body in space and if the time was t then the location is in space-time.
Thus we get that changing frame of reference will affect the system of the Earth.
This is because there might not be one restriction site bordering the gene to be cloned and the identical restriction site in the plasmid. Since these two restriction enzymes make compatible sticky ends, the insert has a chance of combining with the plasmid. To ensure efficient digestion, the two recognition sites should be more than 10 base pairs apart. If one of the enzymes is a poor cutter or if the sites are separated 10 base pairs or less, the digestions <span>should be performed sequentially</span>
Answer:
c. polygenic
Explanation:
Polygenic trait is trait that is controlled by more than one gene. This is different than Mendelian genetics in which one gene controls one trait (e.g. flower color). Expressed phenotype is mix of all genes that control it (each gene has the same influence on phenotype).
Traits that are polygenic are height, skin and hair color, intelligence etc.