Which of the following processes result in the production of recombinants?
i. crossing over between linked genes
ii. reassortment of non-linked genes
iii. mutation
a. i only
b. i and ii only
c. i and iii only
d. i, ii and iii

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte