Which type of transport is the transport of materials along a concentration gradient from high to low concentrations? a. active transport b. vesicle transport c. passive transport d. all of the above.

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

20 the compound al(nh3)2 has atoms of nitrogen.