Explanation:
the name porifera means pore bearer in latin. a sponges body is covered by a skin, one cell thick. this skin has lots of small pores ad a few large openings. the small openings are the entrances to a complex system of channels. these collar cells pump water through the entire sponge and filter out food for the sponge cell to eat
Answer:
A group of bacteria that accumulate in layers and secrete an protective extracellular material.
Explanation:
The biofilm is a natural way how the bacteria get together to survive in an ecosystem or in another living thing. They build little by little this kind of building with different layers of bacteria that secrets a polymer, this protection polymer could be useful to protect the colony or to be attach to another cell or to a tissue. In medicine and in veterinarian studies is interesting because can be useful to create a film to protect some injuries.
Answer:
There are 4 main types of skin cancer:
Basal cell carcinoma. Basal cells are the round cells found in the lower epidermis. ...
Squamous cell carcinoma. Most of the epidermis is made up of flat, scale-like cells called squamous cells. ...
Merkel cell cancer. ...
Melanoma.
Explanation:
