Joe Student is looking through a microscope at a sample of planktonic life filtered from the Gulf of Mexico. He discovers a single-celled organism with no pigmentation, but with a glassy-looking and porous shell or skeleton. Through the pores, tiny extensions of cytoplasm extend out in all directions, stiffened by thin rods. Joe is correct in thinking he is observing a member of the .

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .

prothallium

explanation: