Autotrophic nutrition and
heterotrophic nutrition.

compass can be used day and night, cloudy or sunny

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

once a carousel is in motion, the constant movement of the carousel horse around the center of the circle can best be described asacceleration or change in velocity.