Convection currents in the mantle are driven by changes in the density and the temperature of the material. select the boxes that show the correct motion of matter as its temperature and density change.

a density increases and the matter moves towards the upper mantle

b density increases and the matter moves towards the lower mantle

c density decreases and the matter moves towards the upper mantle

d density decreases and the matter moves towards the lower mantle

e temperature increases the matter moves towards the upper mantle

f temperature increases and the matter moves towards the lower mantle

g temperature decreases and the matter moves towards the upper mantle

h temperature decreases and the matter moves towards the lower mantle

Mitosis creates two identical daughter cells from one parent cell creates four nonidentical daughter cells from one parent cell is the most common type of reproduction for bacteria is the process by which male and female reproductive cells are created

Astudent from one of the research labs is having trouble preparing a slide for examination and photographing. the bacterial slide that he has brought to you was prepared using a commercially purchased stain. he has asked for your in determining what he is doing wrong so that he can change the lab protocols and continue on with his project. after examining the slide under oil immersion, you determine that no bacteria are present even though the student is able to show you the culture he used to make that slide that has visible growth in the liquid medium. which of the following statements does not explain the fact that there are no bacteria present on the student’s slide? by not allowing a glass slide to completely air dry before heat fixation, the flame will cause the surrounding water to boil and this will damage the bacterial cell. overheating during the fixation step boiled the water within the bacterial cells and resulted in the cells bursting. insufficient heating of the slide did not drive out the thin layer of water and this resulted in minimal bonding between the bacteria and the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide.

List the substances normally stored in bone tissue