Arthropods are a group of organisms which possess an exoskeleton, <span>jointed appendages, and segmented bodies. This group mostly includes insects, arachnids, and crustaceans. Therefore, the answer to the question above would be option C: jointed appendages. Hope this helps.</span>
Answer:
Your body has different kinds of cells. Though they might look different under a microscope, most cells have chemical and structural features in common. In humans there are about 200 different types of cells and within this cells there are about 20 different types of structures or organelles.
Pretty sure the answer is oxygen, as it is produced in photosynthesis and consumed in respiration.