Invertebrates have a (an) which provides a support framework.

Invertebrates is the largest group in the animal kingdom. 97 percent of all animals are invertebrates. Their main characteristic is that they do not have backbones.
Invertebrates have an exoskeleton which provides a support framework.Exoskeleton is an external anatomical feature that supports and protects the animal's body. 

$527.7.if the following was the question  $527.7 is the answer.students who are trying to raise funds have an agreement with a local pizza chain. the chain has agreed to sell them pizzas at a discount, which the students can then resell to families in the local community for a profit. it is expected that of the 500 families in the community, at most 70% will buy pizza. based on a survey of their personal preferences, the students believe that they should order no more than 120 cheese pizzas, no more than 150 pepperoni pizzas, and no more than 100 vegetarian pizzas. they also want to make sure that at least 20% of the total pizzas are cheese and at least 50% of the pizzas are pepperoni. they make a profit of $1.45, $1.75, and $1.98, respectively, for each cheese, pepperoni, and vegetarian pizza they resell. how many pizzas of each type should they buy?

Sorry i don’t know what to do with this