The disease anthrax is caused by the pathogenic bacterium , which produces heat-resistant structures known as . The disease anthrax is caused by the pathogenic bacterium , which produces heat-resistant structures known as . Azotobacter chroococcum / plasmids Azotobacter chroococcum / endospores Bacillus anthracis / endospores Bacillus anthracis / plasmids

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

during expiration the diaphragm relaxes, which causes the diaphragm to move downwards. the contraction of diaphragm increases the space for expansion of lungs. hence, the diaphragm relaxes and positioned downward during expiration.