Are surface appendages that allow a bacterium to stick to a surface.
(a)-mitochondria
(b)-ribosomes
(c)-fimbriae
(d)- cell walls
(e)-flagella

Astudent conducts an experiment to determine how the amount of water given to a plant affects it growth what is the dependent variable for this experiment

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2