Answer:
b) Insoluble in water
Explanation:
Lipids or fats are water-insoluble organic molecules and soluble in certain organic substances such as alcohol, ether and acetone.
Lipids can be found in plant and animal foods and should be consumed in a balanced manner. These molecules have functions such as energy reserve, thermal insulation and vitamin absorption.
Lipids are esters, meaning they are composed of one acid molecule (fatty acid) and one alcohol molecule (glycerol or other). They are insoluble in water because their molecules are nonpolar, that is, they have no electric charge and therefore have no affinity for the polar molecules of water.
<span>Photosynthesis and cellular respiration are complementary processes that could not occur without one another.
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<span>The correct answer is b.0.5 to 1 micrometre thick.</span>
Usually, the respiratory membrane is about 0.6 micrometres thick. This membrane consists of the alveolar epithelial cells, the capillary endothelial cell, and basement membranes which are formed by the alveolar and capillary cells.
V₍t₎ = 2πr/t
time is taken