Author: Anonymous

X12.6A – Match each anatomical observation with the arthropod group it best identifies. Note:  Answer choices may be used more than once.

X11.11A – A triploblastic animal is bilaterally symmetrical and undergoes radial cleavage during embryonic development. Which classification is most specific?

L12.18 – Use the labeled diagram and the detailed descriptions below to identify each indicated structure in the sea star – internal and external. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: A combined external and cutaway diagram of a sea star shows a central body with five radiating extensions, small surface projections and grooves, flexible locomotor appendages with internal bulbs, digestive and reproductive organs within the extensions, and canals of the water-vascular system. Lettered markers indicate the structures to identify. Detailed image descriptions are provided in the matching prompts below.

X13.9A – Which three regions make up the characteristic body plan of acorn worms and pterobranchs?

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.

L13.4 – Use the labeled diagram and the detailed descriptions below to identify each indicated structure in the actinopterygian fish – external. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: A side-view illustration of a ray-finned fish shows the head openings, a protective flap over the respiratory region, a sensory canal, paired and unpaired fins, and a nearly symmetrical tail. Lettered markers indicate the structures to identify. Detailed image descriptions are provided in the matching prompts below.

X12.1A – Which developmental feature is associated with protostome development?

L11.3 – Each embryo in the developmental sequence is identified by a letter from A through H. Use the letter and the accompanying visual description in each prompt to identify the developmental process, cleavage pattern, embryonic structure, or developmental fate being asked about. Do not identify the overall stage shown by the letter unless the prompt specifically asks for a structure or process associated with it. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: A looping developmental sequence contains eight lettered embryo images. Image A is one undivided round cell with a central nucleus. Image B contains two cells. Image C contains four cells. Image D contains eight cells arranged in aligned upper and lower tiers. Image E is a compact, solid ball of many cells. Image F is a hollow ball with a single outer cell layer surrounding a fluid-filled center. Image G has a shallow indentation and opening at one pole. Image H has a much deeper inward fold that forms a large internal pocket. The matching prompts repeat the relevant visual features and ask about processes, structures, or developmental fates without naming the embryo stage. Detailed image descriptions are provided in the matching prompts below.

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.

L12.10 – Use the labeled diagram and the detailed descriptions below to identify each indicated external or internal structure in the male nematode roundworm. Note: Not all answer choices will be used. Each correct answer choice is used once. Image Description: A longitudinal cutaway shows a male nematode with the anterior end at the left and the posterior end at the right. The illustration includes the layered outer body covering, a straight digestive tube, coiled male reproductive ducts, a thin longitudinal neural structure along the ventral body wall, a posterior reproductive storage chamber, and the terminal digestive opening. Markers A–G identify the structures to match. Detailed image descriptions are provided in the matching prompts below.