1.In some cases humans may consume other animals as food. Sponges are not a good option. Why do you think they are inedible?

Sponges are made of material that is, first of all, hard to eat. Second of all, sponges don't provide many nutrients that would make eating the sponge worth it in the first place

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.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.