Which answer below is a support and movement structure that is maintained by water or body fluid? exoskeleton endoskeleton chitin hydroskeleton

Option D, hydroskeleton

Explanation:

The hydro skeleton is structure which is commonly found in the animals that have soft body with fluid filled cavity. This fluid in the cavity exerts pressure on the surrounding muscles which help an organism to change its body shape or move. These organism generally move by contracting and expanding their body . Some example of animals possessing hydrostatic or hydroskeleton are star fish, earthworms etc.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products