Which of the following scenarios are examples of positive-feedback mechanisms? check all that are correct.
deforestation near the sahara desert causes the soil to be exposed. exposed soil evaporates moisture more readily. insufficient moisture leads to the death of trees.
a warmer atmosphere causes more evaporation. more water vapor in the atmosphere leads to more cloud cover, which reflects more incoming solar radiation back to space and cools the surface.
a warmer atmosphere causes more evaporation. water vapor is a greenhouse gas, so this increases the temperature.
earth warms and radiation cools earth, much like a warm cup of coffee cools down if you let it sit on a table.
warmer temperatures cause snow to melt. this makes the ground darker, allowing more solar radiation to be absorbed. the warmer ground warms the atmosphere.

Option (1), (3) and (5).

Explanation:

Positive feedback mechanism also exist in the environment that increases the causative effect of the environment. The environment can change the temperature, precipitation and other climatic conditions of the area.

The lack of moisture in Sahara desert and deforestation can cause the trees extinction. The temperature can be increased by the green house gases as the warm atmosphere causes evaporation. The snow gets melted due to increase in temperature and the ground becomes more darker.

Thus, the correct answer is option (1), (3) and (5).

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.