Tropical and polar climate zones are very distinct this is because ?

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

What happens to the amount of waste in the pond as the ecosystem ages?