Almost all the energy used by living things comes from

Sun

Explanation: Almost all the energy that is used by the organism on Earth is derived from the Sun. It is source of energy, power and heat which is used by the organism for various purposes.

The sun provides energy and sunlight for the process known as photosynthesis. This process provides food to the organism living in the ecosystem. Without this process there would be no energy source available to the organism.

thymine. in rna, thymine is replace by uracil

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.