Why don't animal cells need chloroplasts? a) animals do not make their own food. b) animal cells make their own chlorophyll. c) animal cells collect sunlight another way. d) animals use photosynthesis to make their own food.

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "