The most important trait that modern fish had developed was the transformation of their skeleton from cartilage to bones. This was called ossification. Eventually, bony fishes and sharks dominated the waters because their body structure development which helped them as swimmers is advanced compared to earlier fishes.
<span>A dog meets all the characerisitcs of life in the following ways - they maintain homeostatis, are made of cells, breathe and have a metabolism, are able to reproduce, pass their traits off to their offspring, they grow and change, and and respond to their environment.</span>
The manipulation of genes for practical purposes, such as medicine, agriculture, or criminal justice, is called GENETIC ENGINEERING. These technologies involve the manipulation of the DNA molecule.
Deoxyribonucleic acid (DNA) is the molecule that carries the instructions (i.e., genes) for all organisms to develop, survive, grow and reproduce.
Genetic engineering techniques consist of the manipulation of the DNA molecule in order to produce desirable phenotypic features in the offspring of an organism.
Genetic engineering techniques use recombinant DNA strategies to modify the genetic makeup (DNA) of the target organism.
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True, Eukarya is the only domain with multicellular organisms
Answer:
Relative velocity simply means velocity relative to a certain observe point, in this case, the river shore.
This is a type of complex movement; a boat is moving with a certain velocity, let's say 8 m/s. However, the river this boat moves on also has its velocity, let's say 2 m/s. Since the shore isn't moving, the velocity of the boat relative to the shore will be simple resultant velocity of the boat's and the river's velocities.
Let's illustrate this with two examples:
1) if the boat is moving downstream both are moving in the same direction, so the resultant will be 8 m/s + 2 m/s = 10 m/s.
So, any spectator looking at the boat from the shore will think its velocity is 10 m/s, when in reality it's 8 m/s.
2) if the boat is moving upstream, these two velocities have opposite directions, so the resultant will be 8 - 2 = 6 m/s
So, as a short summary, relative speed is an object's speed in regard to another chosen referent point.
