Which of these changes occurs near the end of the third trimester of fetal development?
A. All parts of the eyes begin to develop.
O B. All cells finish differentiating.
C. The fetus moves to a head-down position.
D. The sex of the fetus becomes obvious.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

protistas excret ethanol used in the manufacture of vinegar

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate