Question: You are presented with the question "What do all vertebrates have that invertebrates don't?" and the following answer choices: - sensory neurons - fur and fat - bones and joints - a jaw bone - kinetic energy - Chemical energy - a spinal column - a set of gills Now knowing that vertebrates are all chordates that have a backbone and invertebrates are animals who lack a backbone or spinal column, choose the best answer.
Answer: a spinal column

Question: You are presented with the question "Which species doesn't have an anterior or posterior end?" and the following answer choices: - animals - peachleaf willow - Rabbits - Blowfish - fur seals - Snakes - Echinoderms - alpacas Now knowing that adult echinoderms have radial symmetry and animals with radial symmetry lack an anterior and posterior end, choose the best answer.
Answer: Echinoderms

Question: You are presented with the question "What is a chemical element that is essential for body processes?" and the following answer choices: - potash - atoms - arsenic - copper - H 2 O - sodium - dihydrogen monoxide - iron Now knowing that minerals are chemical elements that are essential for body processes and iron deficiency Anemia is associated with low levels of the mineral iron in the body, choose the best answer.
Answer:
iron