Which of the following structures are found in gymnosperms but not in angiosperms? a. cones b. pollen c. seeds d. flowers

the answer is A. Cones. both have seeds and pollen however Gymnosperms have cones and no flowers. and angiosperms do not have cones they have fruit

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.