Vertebrates and invertebrates differ in the presence of a backbone. another characteristic that distinguishes most vertebrates from many invertebrates, is that vertebrates —

question 9 options:

have a relatively well-developed brain and circulatory system.

have long tube-like bodies that are divided into segments.

take in oxygen from their skins rather than from an inside organ.

have hard outer covering called exoskeletons.

The other person is completely incorrect, it is A.

Explanation:

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.