During a lab activity, students prepared two solutions separately at the same temperature. Later they mixed the solutions and the temperature
dropped. Why?
ΟΑ. There was no energy input during the chemical reaction.
ов. Energy was absorbed during the chemical reaction.
Oc Energy was released during the chemical reaction.
OD The temperature of the surroundings dropped.

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed