Which of the following must occur in order for an ecosystem to continue to exist? А
The populations of producers and decomposers must be stable.
B
The populations of animals must continue to decrease.
С
There should be more populations of consumers than producers.
D
There should be fewer populations of producers than consumers.
Ok

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Which chemical equation is unbalanced? which chemical equation is unbalanced

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