The waste product of humans and animals are carbon dioxide and water, that is aerobic respiration and as for anaerobic respiration it is lactic acid.
Hope this helps
Answer:
Im pretty sure its D or A
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.
The urinary system consists of the kidneys, the ureters, the urinary bladder, and the urethra.
The appearance of fossils would the the answer.
Although there has been some scientific debate about what fossil strata should mark the beginning of this period, the "International Geological Congress" determined that the Cambrian period was approximately 543 million years ago of which the first appearance in the fossil record of worms that made horizontal burrows was discovered.
