Answer:
The correct answer is leaves, spines are modified leaves.
Explanation:
Cactus have spines, the thorn-like thing, in which replace leaves. These spines lower the surface area of the cacti reducing water loss. These spines are actually advance modified leaves which rise according to their environmental conditions.
The stem of a cactus is also thick and fleshy which allows it to store water. The cacti's stem also has a waterproof waxy kind of layer to help retain more water.
Thus, the spines of a cactus plant are nothing but a modified leaf.
Answer:
Erythema nodosum is characterized by tender, red bumps, usually found symmetrically on the shins. Up to 55 percent of cases have no clear identifiable cause. Sometimes, erythema nodosum is not a separate disease. Rather, it is a sign of some other infection, disease, or of a sensitivity to a drug.
1) heat flows from hot to cold. the heat from the fire is let off from the exothermic reaction of the fire and warms up the surroundings, including yourself.
2) food is cooked in the oven by heat transfer. the heat warms up the pan and thru conduction, the food is heated and cooked.
3) I'm guessing this question is y it heats up? the answer to that is that the heat waves from the sun is absorbed into the car from radiation and thru convection the whole car is heated