On the galápagos islands, darwin observes tortoises with domed and saddle-shaped shells. how did darwin’s observations of these tortoises with form the theory of evolution by natural selection?

1. a tropical dry forest carries out more rapid nutrient cycling

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.