Cytoplasm A jelly-like material that contains dissolved nutrients and salts and structures called organelles. It is where many of the chemical reactions happen.
Nucleus Contains genetic material, including DNA, which controls the cell’s activities.
Cell membrane Its structure is permeable to some substances but not to others. It therefore controls the movement of substances in and out of the cell.
Mitochondria Organelles that contain the enzymes for respiration, and where most energy is released in respiration.
Ribosomes A tiny organelle where protein synthesis occurs.
Warm because land gains heat faster than water when heated by the sun. The heated land then transfers the heat to the atmosphere. The air mass is dry becasue a continent is mainly land and very little water (unlike oceans). There is, therefore, very little moisture in the continental tropical air mass.
