A model organism is a species that has been widely studied to understand a particular biological phenomena, normally used because they are easy to breed and maintain in a laboratory setting and has certain experimental advantage.
The criteria that Thomas hunt Morgan was looking for include; the model organism should be small in size, easy to keep in the laboratory and also able to produce large number of off springs in a short time.
Answer:
A
Explanation:
I believe the answer is A. One is polar and One is non polar. H20 is the polar one. Polar beans there is a charge to it and the bonds are unevenly distributed. Since the hygrogen molecules are negatively charged, they make it polar. This is why water can mix with salt and stuff. O2 is non polar because the bonds are equal. There is a even distribution of electrons between the two oxygens so it has an even balance. This causes it to be non-polar.
That is why I think it is A
Answer;
-Pectinate muscles
Explanation;
-Pectinate muscles are shaped a little like hair, and their function is maxium atrial contraction with minimal muscle mass.The pectinate muscles (musculi pectinati) are parallel ridges in the walls of the atria of the heart. They are so-called because of their resemblance to the teeth of a comb as in pecten.
-The pectinate muscles are ridge like elevations of muscle. They are parallel to each other and resemble teeth of a comb. They are easily observed inside the right atrium.
Egg cel :) because egg cells are used to produce offspring.
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Natural springs are not a means of water erosion. Some types of water erosion include rain, streams, rivers, and ocean waves.</span>
