Two different sets of genes control embryonic development in drosophila: maternal-effect genes and zygotic genes. products of the maternal-effect genes (mrna and/or proteins) are distributed in a gradient throughout the egg and regulate the expression of the first three groups of zygotic genes (gap, pair-rule, and segment polarity genes).

B] nitrogen fixationmight be wrong, so correct me.want extra on your answers? just go on my account and go on questions and answer, or ask in the comments!

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.