When oxygen is lacking, animal cells change to . first blank: second blank: -lactic acid -lactic acid -pyruvic acid -pyruvic acid

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

What controls activities within a eukaryotic cell?

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit