Can you give me some more info
Yaa that statement is true, complex chemical catalyst of living cells are enzymes
Heat absorbing (endothermic) reactions have an increased temperature once the reaction occurs. If it is exothermic the temperature of the substance itself decreases and it gives off heat.
The correct option is B.
For a mature woman, each month the increased level of estrogen hormone leads the pituitary gland to secrete luteinizing hormone. Once this hormone is secreted, the ovary releases a single egg which moves down to the lining of the uterus. If fertilization does not occur, the egg is shed together with the lining of the uterus in a monthly process called mensuration. If fertilization occur, then the fertilized egg attach to the lining of the uterus and placenta is formed. The fertilized egg then send signal to the ovary to keep secreting progesterone, which will sustaining the pregnancy by keeping the uterus lining thick and nourishing for the developing embryo.
here are approximately 4,740 species of frogs around the entire world. There are about 90 species of frogs in the United States. Unfortunately, about 120 amphibian species, including frogs, toads and salamanders, have disappeared since 1980.
hope this helps:)sorry if it doesnt
