Question is incomplete. Complete question has been attached.
Answer:
d. X
Explanation:
According to the given data, Tom is looking for five desirable traits in his hamsters. These traits are dark brown color, white bellies, long fur, black eyes and long tails. He should choose the male which can result in maximum number of the given traits.
We do not have any knowledge about the mode of inheritance of these traits ( dominant, recessive, multiple gene etc. ). So the decision should be eyeballed according to the phenotype present in the male. The male which has maximum number of desirable phenotypes should be mated with the female to increase the chances of bringing the desirable alleles together and thus getting the progeny with the same traits.
Out of the four given options Hamster W, Y and Z have 3 desirable traits whereas Hamster X has four desirable traits ( dark brown fur, white belly, long fur and long tail ). Hence, Tom should buy Hamster X in order to have best chance of breeding baby hamsters with most of the desirable traits.
Answer:
The correct answer is <em>c. animal wastes and fertilizers. </em>
Explanation:
Two major sources of nitrate pollution are farming and breeding activities. There are also certain industrial activities involved in nitrate pollution, but in general, these industries are related to agriculture.
The indiscriminate use of fertilizers for several years in intensive productions produce high nitrate concentration in soil and consequently elevate the risk of nitrate lixiviation.
Breeding animals produce nitrate pollution by their wastes, which accumulate and are not treated. These wastes include flesh, hair, feathers, skin, fat, liquids, excrements, among others. These wastes are an important source of nitrate.
In many cases, animal wastes are used by farmers as organic matter to improve their production. But excessive and incorrect use of it might produce severe damage in water sources.
Answer:
D. Diffusion through a semipermeable membrane
Explanation:
Diffusion refers to the movement of particles from a section in which there are more of them (high concentration) into a section where there are less of them (low concentration) until both sections are equal.