1.
Which type of biotechnology is used by scientists when they alter the DNA of a plant to make it grow faster? (4 points)
Genetic engineering because the genes of the plants were modified
Genetic engineering because it is always helpful to society
Artificial selection because the DNA of the plant was changed
Artificial selection because it always produces desirable traits

2.
(06.01 MC)

What is the likely advantage of growing a genetically modified variety of corn that possesses its own pesticide? (4 points)
The shelf life and sale of corn would increase.
It is more efficient and economical to grow this variety.
When consumed it offers more nutrients than the regular variety.
When consumed it improves the quality of life of people with genetic disorders.

1. Genetic engineering because the genes of the plants were modified

2. The shelf life and sale of corn would increase.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

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.