Answer the following question given this paragraph: Watch this short video (http://openstaxcollege. org/l/transgenic) explaining how scientists create a transgenic animal. Although the classic methods of studying the function of genes began with a given phenotype and determined the genetic basis of that phenotype, modern techniques allow researchers to start at the DNA sequence level and ask: "What does this gene or DNA element do?" This technique, called reverse genetics, has resulted in reversing the classical genetic methodology. One example of this method is analogous to damaging a body part to determine its function. An insect that loses a wing cannot fly, which means that the wing's function is flight. The classic genetic method compares insects that cannot fly with insects that can fly, and observes that the non-flying insects have lost wings. Similarly in a reverse genetics approach, mutating or deleting genes provides researchers with clues about gene function. Alternately, reverse genetics can be used to cause a gene to overexpress itself to determine what phenotypic effects may occur. Q: Which kind of genetics approach involves mutating or deleting genes provides researchers with clues about gene function? Choices: - possible genetics - impossible genetics - inverse genetics - reverse genetics A:
reverse genetics
(Question)
Answer the following question given this paragraph: Collision of a relatively slow-moving neutron with a fissile nucleus can split it into two smaller nuclei with the same or different masses. Neutrons are also released in the process, along with a great deal of energy. Any isotope that can undergo a nuclear fission reaction when bombarded with neutrons is called a fissile isotope. During nuclear fission, the nucleus usually divides asymmetrically rather than into two equal parts, as shown in Figure 20.7 "Neutron-Induced Nuclear Fission". Moreover, every fission event of a given nuclide does not give the same products; more than 50 different fission modes have been identified for uranium235, for example. Consequently, nuclear fission of a fissile nuclide can never be described by a single equation. Instead, as shown in Figure 20.8 "Mass Distribution of Nuclear Fission Products of ", a distribution of many pairs of fission products with different yields is obtained, but the mass ratio of each pair of fission products produced by a single fission event is always roughly 3:2. Figure 20.8 Mass Distribution of Nuclear Fission Products of 235U. Q: How does the nucleus divide during nuclear fission? Choices: - evenly - biochemically - equally - asymmetrically A:
(Answer)
asymmetrically
Ques: Answer the following question given this paragraph: Chemical energy and nuclear energy are other forms of potential energy. Q: Chemical energy is another form of which energy? Choices: - heat energy - nuclear energy - mechanical energy - potential energy A:
Ans: potential energy
(Q).
Answer the following question given this paragraph: Jet streams are fast-moving air currents high in the troposphere. They are also the result of unequal heating of the atmosphere. Jet streams circle the planet, mainly from west to east. The strongest jet streams are the polar jets. The northern polar jet is shown in Figure below . Q: What is the term for the fast-moving air currents high in the troposphere? Choices: - gale force winds - ocean streams - global winds - jet streams A:
(A).
jet streams
Ques:Answer the following question given this paragraph: Producing light without a high temperature is called luminescence. Types of luminescence include fluorescence, electroluminescence, and bioluminescence. Q: Producing light without a high temperature is called? Choices: - plasma - fluorescence - effervescence - luminescence A:

Ans:luminescence
Answer the following question given this paragraph: Codominance is when two alleles are both expressed in the heterozygous individual. Q: What is it called when two alleles are both expressed in the heterozygous individual? Choices: - weak dominance - low dominance - shared dominance - codominance A:
codominance