Answer:
c. constant expression of the lac operon in the absence of lactose.
Explanation:
The lac operon allows to shift the metabolism from glucose to lactose. In the abscence of lactose, this repressor, lacl, impede the expression of the lac operon. If this repressor is not functional, the lac operon would be expressed in the absence of lactose.
The right option is; d. Runoff describes water movement and infiltration describes water storage.
Runoff is the portion of precipitation, irrigation or snow melt that flows over land as surface water instead of infiltrating or evaporating. Factors that influence runoff are permeability, amount of rainfall, slope and vegetation.
Infiltration is the process by which water or precipitation on the ground surface moves into the soil. Factors that determine the rate of infiltration include; soil type, topography of the land, amount of precipitation, vegetation, and pre-saturation levels.
B. I think thats right :/
Sea lions use their back, hind flippers and front flippers to easily glide in the water.
Therefore, sea lions is the answer.