Answer the following question given this paragraph: Spinal Cord Development While the brain is developing from the anterior neural tube, the spinal cord is developing from the posterior neural tube. However, its structure does not differ from the basic layout of the neural tube. It is a long, straight cord with a small, hollow space down the center. The neural tube is defined in terms of its anterior versus posterior portions, but it also has a dorsalventral dimension. As the neural tube separates from the rest of the ectoderm, the side closest to the surface is dorsal, and the deeper side is ventral. As the spinal cord develops, the cells making up the wall of the neural tube proliferate and differentiate into the neurons and glia of the spinal cord. The dorsal tissues will be associated with sensory functions, and the ventral tissues will be associated with motor functions. Q: The spinal cord develops, cells making up the wall of the neural tube proliferate and differentiate into what? Choices: - membrane and glia - muscles and glia - jelly and glia - neurons and glia A:
neurons and glia

Answer the following question given this paragraph: Diffraction is the bending of waves around a corner. Q: What is the bending of waves around a corner called? Choices: - reflection - propulsion - absorption - diffraction A:
diffraction

Answer the following question given this paragraph: Each type of rock weathers in its own way. Certain types of rock are very resistant to weathering. Igneous rocks tend to weather slowly because they are hard. Water cannot easily penetrate them. Granite is a very stable igneous rock. Other types of rock are easily weathered because they dissolve easily in weak acids. Limestone is a sedimentary rock that dissolves easily. When softer rocks wear away, the more resistant rocks form ridges or hills. Q: Hard igneous rocks and easily dissolved sedimentary rocks respond very differently to what natural force? Choices: - gravity - sunlight - evaporation - weathering A:
weathering

Answer the following question given this paragraph: The Volvox sphere has a distinct front and back end. The colony of cells can swim in a coordinated fashion. The cells have eyespots, which are more developed in the cells near the front. This enables the colony to swim towards light. Q: What has a distinct front and back end? Choices: - hydro sphere - heroclix sphere - imipenem sphere - volvox sphere A:
volvox sphere