Multiple choice

Which of the following statements regarding the cephalopods is INCORRECT?

  1. Cephalopod vision is acute.

  2. Cephalopods are the only mollusks with a open circulatory system.

  3. Most cephalopods possess chromatophores.

  4. Cephalopods can change their colours.

  5. Most cephalopods can move by jet propulsion.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cephalopods are the only mollusks with a closed circulatory system. Coleoids have two gill hearts (also known as branchial hearts) that move blood through the capillaries of the gills. A single systemic heart then pumps the oxygenated blood through the rest of the body.

Keep practicing — related questions