The chart shows characteristics of four different groups of invertebrate animals.
Animal
1
2
Characteristics
Has a centralized body cavity,
uses pores and specialized cells
to obtain oxygen from water
Has a soft body and may have a
shel; uses ils or lungs for
obtaining oxygen
Has arms that extend from the
middle of the body, uses tube
feet for obtaining oxygen
Has a segmented body, obtains
oxygen through skin
3
Which set of characteristics describes an echinoderm?
Animal 1
Animal 2
Animal 3
Animal 4

i just got this problem. it's 90.3

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i would say b

explanation:

but i think i would need more information than that