Answer the following question given this paragraph: Like bacteria, reproduction in archaea is asexual. Archaea can reproduce through binary fission , where a parent cell divides into two genetically identical daughter cells. Archaea can also reproduce asexually through budding and fragmentation, where pieces of the cell break off and form a new cell, also producing genetically identical organisms. Q: Pieces of the cell break off and form a new cell in what type of reproduction that produces genetically identical organisms? Choices: - Meiosis - Mitosis - Fusion - fragmentation A:
fragmentation
(Question)
Answer the following question given this paragraph: Some people recover from spinal cord injuries. But many people are paralyzed for life. Thanks to the work of Christopher Reeve ( Figure below ), more research is being done on spinal cord injuries now than ever before. For example, scientists are trying to discover ways to regrow damaged spinal cord neurons. Q: What system is the spinal cord related to? Choices: - circulatory system - lymphatic system - digestive system - nervous system A:
(Answer)
nervous system
Ques: Answer the following question given this paragraph: An ideal gas is one that follows the gas laws at all conditions of temperature and pressure. To do so, the gas would need to completely abide by the kinetic-molecular theory. The gas particles would need to occupy zero volume and they would need to exhibit no attractive forces what so ever toward each other. Since neither of those conditions can be true, there is no such thing as an ideal gas. A real gas is a gas that does not behave according to the assumptions of the kinetic-molecular theory. Fortunately, at the conditions of temperature and pressure that are normally encountered in a laboratory, real gases tend to behave very much like ideal gases. Q: What is the term for a gas that completely abides by the kinetic-molecular theory? Choices: - heat gas - cold gas - fast gas - ideal gas A:
Ans: ideal gas
(Q).
Answer the following question given this paragraph: It is necessary to distinguish between the two types of covalent bonds in a C 2 H 4 molecule. A sigma bond ( bond) is a bond formed by the overlap of orbitals in an end-to-end fashion, with the electron density concentrated between the nuclei of the bonding atoms. A pi bond ( bond) is a bond formed by the overlap of orbitals in a side-by-side fashion, with the electron density concentrated above and below the plane of the nuclei of the bonding atoms. Figure below shows the two types of bonding in C 2 H 4 . The sp 2 hybrid orbitals are orange and the p z orbital is green. Three sigma bonds are formed by each carbon atom with its hybrid orbitals. The pi bond is the "second" bond of the double bond between the carbon atoms and is shown as an elongated blue lobe that extends both above and below the plane of the molecule, which contains the six atoms and all of the sigma bonds. Q: What term is used to describe a bond formed by the overlap of orbitals in an end-to-end fashion, with the electron density concentrated between the nuclei of the bonding atoms? Choices: - beta bond - lattice bond - rna bond - sigma bond A:
(A).
sigma bond
Ques:Answer the following question given this paragraph: Vertebrates. From the smallest of fish to us. One of the main features we all have in common is our backbone. The Vertebrates chapter describes the biological features of fish, amphibians, reptiles, birds, and mammals. Q: One of the main features all vetebrates have in common is what? Choices: - hard shell - brain - skeleton - backbone A:

Ans:backbone
Ques: Answer the following question given this paragraph: Black holes Black holes are objects having such large gravitational fields that things can fall in, but nothing, not even light, can escape. Bodies, like the Earth or the Sun, have what is called an escape velocity. If an object moves straight up from the body, starting at the escape velocity, it will just be able to escape the gravity of the body. The greater the acceleration of gravity on the body, the greater is the escape velocity. As long ago as the late 1700s, it was proposed that if the escape velocity is greater than the speed of light, then light cannot escape. Simon Laplace (17491827), the French astronomer and mathematician, even incorporated this idea of a dark star into his writings. But the idea was dropped after Young's double slit experiment showed light to be a wave. For some time, light was thought not to have particle characteristics and, thus, could not be acted upon by gravity. The idea of a black hole was very quickly reincarnated in 1916 after Einstein's theory of general relativity was published. It is now thought that black holes can form in the supernova collapse of a massive star, forming an object perhaps 10 km across and having a mass greater than that of our Sun. It is interesting that several prominent physicists who worked on the concept, including Einstein, firmly believed that nature would find a way to prohibit such objects. Black holes are difficult to observe directly, because they are small and no light comes directly from them. In fact, no light comes from inside the event horizon, which is defined to be at a distance from the object at which the escape velocity is exactly the speed of light. The radius of the event horizon is known as the Schwarzschild radius R S and is given by. Q: Not even light can escape from what extremely dense object sometimes found in deep space? Choices: - large holes - light holes - star holes - black holes A:
Ans:
black holes