1. Define codominance.
2. Explain how rabbits can have more than two different coat colors.
3. Discuss how environment can influence phenotype. Give one example.

1. Codominance is a phenomenon in which both alleles of a trait are expressed. This can be seen with blood type. This is, however, to be distinguished from incomplete dominance in which the traits blend to form an intermediate phenotype (e.g. red snapdragon plant and white snapdragon plant forming a pink offspring).

2. Rabbits can have more than two different coat colors because there are numerous alleles that contribute to their coat color. This phenomenon is known as multiple alleles.

3. The environment can influence phenotype by favoring individuals who have phenotypes that give them an advantage over others (e.g. longer necks in giraffes). By favoring certain individuals, those are the ones who pass their traits onto the future population more and thus making the favorable phenotypes more prevalent.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.

well the answer is 2!