Pl help me in a cross-section of soil, what does a horizontal consist of

a) clay, minerals, and little humus

b) humus only

c) partly weathered rocks

d) topsoil

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant

Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated

Can someone i have no idea of how to do this.