Answer:
The correct answer from the provided option is D.
Explanation:
The evidence that supports the vitamin D hypothesis for the evolution of lighter skin tones is indigenous peoples living at high latitudes have darker skin, but they eat foods rich in vitamin D.
This shows that consuming food rich in Vitamin D is not the only factor that determine the skin color as indigenous people live in high latitude areas and consume food rich in vitamin D and still have darker skin.
Active transport requires energy because unlike osmosis and diffusion which are passive transport methods which sees where the particles are moving along the concentration gradient, in active transport, the particles are moving against the concentration gradient and as such energy through ATP is needed for the particles to be transported.
Answer:
G1/S checkpoint
Explanation:
G1/S checkpoint is one of the points in the cell cycle, between growth phase 1 and DNA synthesis phase, where a cell that has been damaged is sensed by DNA repair enzymes and further degraded by apoptosis. In cancer cells, there is mutation in these DNA repair enzymes and thus nothing to correct the cells from dividing even when damaged and thus there is no arrest of division and cells continue dividing
The appropriate answer is b. turgor pressure. Turgor pressure is also known as hydrostatic pressure and is the force of the water inside the cell of the plant that pushes the cell membrane against the cell wall. When this force is strong the cell or the plant is said to be turgid. This pressure is maintained by the process of osmosis.
Plants react differently to the stimulus of light. They will grow or turn leaves towards light.
Answer:
contour farming
Explanation:
Contour farming is the method of growing crops on sides of hills, mountains and steep slopes by planting on graduated terraces built into the slope. This method effectively reduce soil erosion and water loss and maximizes arable land area. In most of the systems the contours are low, flat ridge of earth built across the slope, with a channel for runoff water just above the ridge. In areas where soils are able to take in water and rainfall amount is relatively low, level terraces may be used to reduce soil erosion too.
