Help me PLEASE! Choose one answer! First one to answer get Brainliest! 18.) Which fossil appears to have lived the longest ago?

A.) Fern
B.) Trilobite
C.) Crinoid
D.) Gastropod

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

The chemical form of energy that is useable by the cell to do work

Need ! will give 20 points! what are two ways that diatoms differ from slime molds? the external coverings of diatoms are made up of (silica, chitin or peptidoglycan), while slime molds have cell walls containing (silica, peptidoglycan or chitin). diatoms are (chemoheterotrophs, photoautotrophs or chemoautotrophs) because they make food through photosynthesis, while slime molds are (heterotrophs, phototrophs or autotrophs) because they eat decaying plant matter.