Fruit flies have a diploid number of 8, and honeybees have a diploid number of 32. in which case will crossing over have greater impact on genetic variation? a. genetic variation is likely to be greater in fruit flies. b. the number of chromosomes does not affect crossing over. c. genetic variation is likely to be greater in honey bees.

            The correct option is A.

Explanation:

              As we know that genetic variation that result from crossing over depend on the number of genes and their alleles. When there are more genes in genome the chances of polymorphic loci will increase, which will result into more genetic variation during crossing over.

Forexample:

                    Drosophila melanogaster is a common fruit fly having diploid number of 8 chromosome composed of 122,653,977 base pairs, and about ~17,000 genes.  Honey bees have diploid number of 32 chromosomes composed of approximately 2360000 base pairs, and 10,000 genes.    

Conclusion:

                      As fruit fly genome contain more genes and polymorphic loci, so genetic variation is more likely to be greater in fruit fly.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

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.