Answer/Explanation:
Onions are stem modifications of bulbs. Onions grow during a cold weather, but forms bulbs when the weather is warm. Onions can either be grown using seeds or through their bulbs. That is why, the stem modification of onions are bulbs. Tuber is from potatoes, whereas corm is from crocuses and gladioli.
<span>The gradual thickening of the uterine lining also called Endometrial Hyperplasia is often caused by having excess estrogen without enough progesterone to balance it. During menstruation, the estrogen causes the lining to thicken in preparation for pregnancy. When the progesterone is made during the second half of the cycle and the progesterone levels drop, the lining is shed. And if the ovulation didn’t occur, progesterone is not made and the lining is not shed properly, the lining will keep on building gradually that may lead to cancer in some women. </span>
Answer:
A rainwater containing carbon dioxide dissolves underground rock
Explanation:
Water in an underground rock is groundwater. Underground water can also erode and deposit material. Rainwater absorbs carbon dioxide (CO2) as it falls down to the surface. The CO2 groundwater creates landforms by getting rid of rock.
The correct option is D.
Hydrological cycle refers to the cycle that process the continuous water circulation on the earth surface. Many processes are involved in water cycle, examples are evaporation, condensation, precipitation,transpiration, etc. The constancy of the quantity of water in the hydrological cycle is usually maintained but its distribution changes continuously. The greatest source of water in the hydrological cycle is the ocean.
