Which condition is necessary for water droplets to condense and form clouds? dry air, ice crystals in air, tint particles in air, rising temperatures

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds

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.

The correct answer is d) ribose

Explanation:

The diagram represents a molecule of RNA (ribonucleic acid) because its contains the nitrogenous bases C (Cytosine) , G (Guanine) , A (Adenine) and U (Uracil). Uracil is only present in RNA molecules, and it replaces Thymine (present in DNA molecules). Unline DNA molecules, RNA contains ribose sugars which have -OH groups attached to each carbon in the sugar ring structure. In contraposition, DNA contains deoxyribose sugars, which lack one oxygen atom in 2' position of the sugar ring.