I believe that all the above are ethical concerns regarding genetic engineering. Ethics is the study of moral or socially acceptable behavior. With the advent of genetic engineering and the ability to modify the genome of various organs, many ethical questions arise concerning the various scenarios and possibilities. There are many ethical concerns regarding genetic engineering in plants, animals, and humans. One of the ethical concerns regarding genetically modified plants used for food is whether the nutritional value will be sacrificed in favor of a higher yield or drought resistantancy.
Answer:
d. It avoids the depletion of soil nutrients.
Explanation:
Crop rotation is the process of planting different crops in the same area of land in rotation. This allows the breathing of the soil as well as the retention of nutrients in the soil.
<u>Crop rotation is one form of conserving soil as it helps in saving the nutrients of the soil from getting depleted.</u> As different crops require different nutrients, the change in crop plantation between different types of crops help in maintaining the fertility of the land. This way, when crops are planted in rotation, there is also the rotation of the different nutrients required for the different crops planted, thus allowing the cycle of nutrient change to take place.
Thus, the correct answer is option d.
The question is incomplete. The complete quesetion is:
The outer layers of human skin are composed of dead cells impregnated with keratin and oil, which make the epidermis relatively impermeable to water, yet humans sweat freely in hot temperatures. This occurs because:
a) the salt in sweat allows it to diffuse through the skin.
b) sweat glands have special channels through the skin.
c) an osmotic gradient in sweat moves it through the skin.
d) sweating occurs in only those areas of the body where the skin is water permeable.
Answer:
b) sweat glands have special channels through the skin.
Explanation:
Sweat glands are present in the reticular region of the dermis. This part of the dermis contains bundles of thick collagen fibers, fibroblasts, and various cells. Sweat glands are present between these fibers. The ducts of sweat glands open on the tops of the epidermal ridges as sweat pores to release the secretions of the gland outside. This is how irrespective of the presence of the keratin layer on the outer surface of the skin, it releases sweat in hot summer days.
You can't really expect to find water stored as a gas, as it cools to a liquid at room temperature. You could easily find evaporated water on a stovetop by boiling water, though.