Which structure is not present in all organisms?

a.
a cell wall

b.
a plasma membrane

c.
genetic material

d.
cytoplasm

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water