List ways in which invertebrates compensate for not having a spine

Invertebrates can be simply identified as animals that do not have a backbone. To compensate for the lack of an internal skeleton, most invertebrates have an external skeleton that protects their soft, inner body.

the answer is d (apex) good luck : ))

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