X11.3A – An aquatic animal is sessile as an adult. Water enters through many pores, passes through chambers lined with collar cells, and exits through one large opening. Which conclusion is best supported?

X11.5A – Match each set of human structures with the embryonic germ layer from which it primarily develops. Note:  Answer choices may be used more than once.

L12.13 – Use the labeled diagram and the detailed descriptions below to identify each indicated structure in the bivalve clam – internal and external. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: A cutaway of a clam shows two hinged rigid valves surrounding a thin tissue lining, a muscular lower appendage and internal organ mass, broad respiratory sheets, paired water-flow openings, and muscles that close the valves. Lettered markers indicate the structures to identify. Detailed image descriptions are provided in the matching prompts below.

L11.5 – Use the labeled diagram and the detailed descriptions below to identify each indicated structure in the fertilized chicken egg – amniotic egg. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: Cross-sectional diagrams of a fertilized chicken egg show the rigid outer covering, internal contents, developing organism, and the membranes that surround and support development. Lettered markers indicate the structures to identify. Detailed image descriptions are provided in the matching prompts below.

L13.9 – Use the labeled diagram and the detailed descriptions below to identify each indicated structure in the artiodactyl fetal pig – mouth. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: An open-mouth view of a fetal pig shows the muscular floor, a firm ridged front region and flexible smooth rear region of the roof, and the rear throat area with a protective flap. Lettered markers indicate the structures to identify. Detailed image descriptions are provided in the matching prompts below.

X13.2A – A marine animal has a notochord, dorsal hollow nerve cord, pharyngeal slits, and post-anal tail as a larva. Most of these structures disappear during metamorphosis. Which conclusion is best supported?

L11.2 – The image below shows the same three major anatomical planes intersecting a quadruped (goat) and a biped (human). For each matching prompt, use the organism’s body orientation, the plane’s position, and the directional relationship it establishes to identify the plane’s name. Embedded letters are optional sighted references; the descriptions do not depend on them. Note: Answer choices may be used more than once. Image Description: A side-by-side diagram shows a goat standing on four limbs and a human standing upright within three intersecting planes. Markers A–C identify the planes on the goat, and D–F identify the corresponding planes on the human; the matching prompts also describe each plane’s position and directional relationship in words. Detailed image descriptions are provided in the matching prompts below.

L12.9 – Use the labeled diagram and the detailed descriptions below to identify each indicated structure in the earthworm – internal. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: An opened earthworm diagram shows the digestive tube running from front to rear, pumping vessels around its narrow front section, reproductive sacs in the front body units, repeated excretory structures, and a nerve cord along the underside. Lettered markers indicate the structures to identify. Detailed image descriptions are provided in the matching prompts below.

X11.6A – Match each description with the corresponding phase of a typical cnidarian life cycle. Note:  Not all answer choices will be used. Each correct answer choice is used once.

X12.12A – Which group is an Ecdysozoan rather than a Lophotrochozoan?