Which statement best describes the role of oxygen in cellular respiration: 1. Oxygen molecules form as ATP molecules are made
2. Oxygen molecules form as sugar molecules are broken down
3. Oxygen molecules are a waste product of waste
4. Oxygen molecules are used to make water molecules

segmentation=endoskeleton=backbone=coelom=tissues

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.