Compare the nervous systems of cnidarians, cephalopods, and echinoderms

What will be an ideal response?


Both cnidarians and echinoderms lack any centralization of the nervous system and thus have reflex style responses. Cephalopods have a centralized system with a well-defined brain that coordinates behavior.

Biology & Microbiology

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Which event in inflammation aids in white blood cells migrating from the blood vessel to the site?

a. Arterioles widen. b. Blood flow produces heat in the area. c. Capillary permeability is increased. d. Complement is activated. e. Phagocytes engulf complement coated bacteria.

Biology & Microbiology

Trichomonas vaginalis is a ________.

A. protozoan B. fungus C. bacterium D. helminth

Biology & Microbiology

Which of the following serves as a terminal

electron acceptor in mitochondria? a. pyruvate b. acetyl-CoA c. hydrogen ions d. electrons e. oxygen

Biology & Microbiology

Which phrase best describes sister chromatids?

a. two chromosomes having an identical DNA sequence b. two chromosomes having different alleles of the same genes arranged in a different order c. two chromosomes having the same alleles of the same genes in a different order d. two chromosomes having the same genes in the same order, but having different alleles

Biology & Microbiology