Astalked, sessile marine organism has several feathery feeding structures surrounding an opening through which food enters. the organism could potentially be a cnidarian, a lophophorate, a tube-dwelling worm, a crustacean, or an echinoderm. which of the following traits, if found in this organism, would allow the greatest certainty of identification?
select one: a. a nervous systemb. the presence of what seems to be radial symmetryc. a digestive system with mouth and anus separate from each otherd. a hard covering made partly of calcium carbonatee. a water vascular system

        The right answer to this question is water vascular system.

Explanation:

        Through this system it's possible to identify it easily an echinoderm, that's why we can use it as a method of checking the information. But be careful, because for example, the radial symmetry, is not present in all the kinds of animals said on the question, shrimps are good examples, shrimps are part of the crustaceans. In this way, as you first see the organism, you are going to guess what it is by its appearance, and then you're going to analyse it properly after. Once you check it has a water vascular system, it's most probably to be an echinoderm.

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: