Answer the following question given this paragraph: A kidney stone. The stones can form anywhere in the urinary system. Q: Kidney stones can form anywhere in what system? Choices: - digestive - respiratory - intestinal - urinary A:
urinary
Answer the following question given this paragraph: The Neural Tube To begin, a sperm cell and an egg cell fuse to become a fertilized egg. The fertilized egg cell, or zygote, starts dividing to generate the cells that make up an entire organism. Sixteen days after fertilization, the developing embryo's cells belong to one of three germ layers that give rise to the different tissues in the body. The endoderm, or inner tissue, is responsible for generating the lining tissues of various spaces within the body, such as the mucosae of the digestive and respiratory systems. The mesoderm, or middle tissue, gives rise to most of the muscle and connective tissues. Finally the ectoderm, or outer tissue, develops into the integumentary system (the skin) and the nervous system. It is probably not difficult to see that the outer tissue of the embryo becomes the outer covering of the body. But how is it responsible for the nervous system? As the embryo develops, a portion of the ectoderm differentiates into a specialized region of neuroectoderm, which is the precursor for the tissue of the nervous system. Molecular signals induce cells in this region to differentiate into the neuroepithelium, forming a neural plate. The cells then begin to change shape, causing the tissue to buckle and fold inward (Figure 13.2). A neural groove forms, visible as a line along the dorsal surface of the embryo. The ridge-like edge on either side of the neural groove is referred as the neural fold. As the neural folds come together and converge, the underlying structure forms into a tube just beneath the ectoderm called the neural tube. Cells from the neural folds then separate from the ectoderm to form a cluster of cells referred to as the neural crest, which runs lateral to the neural tube. The neural crest migrates away from the nascent, or embryonic, central nervous system (CNS) that will form along the neural groove and develops into several parts of the peripheral nervous system (PNS), including the enteric nervous tissue. Many tissues that are not part of the nervous system also arise... Q: A sperm cell and an egg cell fuse to become what? Choices: - embryo - fetus - unfertilized egg - fertilized egg A:
fertilized egg
Q: Answer the following question given this paragraph: A cell that does not have a rigid cell wall (such as a red blood cell), will swell and lyse (burst) when placed in a hypotonic solution. Cells with a cell wall will swell when placed in a hypotonic solution, but once the cell is turgid (firm), the tough cell wall prevents any more water from entering the cell. When placed in a hypertonic solution, a cell without a cell wall will lose water to the environment, shrivel, and probably die. In a hypertonic solution, a cell with a cell wall will lose water too. The plasma membrane pulls away from the cell wall as it shrivels, a process called plasmolysis. Animal cells tend to do best in an isotonic environment, plant cells tend to do best in a hypotonic environment. This is demonstrated in Figure below . Q: The plasma membrane pulls away from the cell wall as it shrivels. what is this process called? Choices: - sporozoans - fluctuations - osmosis - plasmolysis A:
A: plasmolysis
Question: Answer the following question given this paragraph: The rate at which a solute dissolves depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute. A given quantity of solute dissolves faster when it is ground into small particles than if it is in the form of a large chunk because more surface area is exposed. The packet of granulated sugar exposes far more surface area to the solvent and dissolves more quickly than the sugar cube. Q: The size of the solute particles determines the rate of what? Choices: - merging - extracting - solution - dissolving A:
Answer: dissolving
*Question*
Answer the following question given this paragraph: A: Other examples of liquid mixtures include salt water and salad dressing. Air is a mixture of gases, mainly nitrogen and oxygen. The rock pictured in the Figure below is a solid mixture. Q: What two gases are the main components of air? Choices: - oxygen and helium - carbon and oxygen - hydrogen and helium - nitrogen and oxygen A:
**Answer**
nitrogen and oxygen
(Q).
Answer the following question given this paragraph: Almost all energy at Earth's surface comes from the Sun. The Sun's energy heats the planet and the air around it. This causes the atmosphere to move and create weather. Sunlight also powers photosynthesis and life on Earth. Q: Almost all energy at earth's surface comes from where? Choices: - another sun - oceans - wind - the sun A:
(A).
the sun