Answer the following question given this paragraph: A pulsar is a rotating neutron star that emits radiation in pulses. A pulsar can only be seen when the beam is pointing toward Earth. Pictured below is a nebular that looks like a cosmic hand ( Figure below ). There is a bright swirl of gas in the wrist of the hand. A very tiny but bright neutron star is in the center of that swirl. Q: What kinds of neutron stars emit radiation in pulses? Choices: - quasars - red giants - dwarf stars - pulsars A:
pulsars
(Question)
Answer the following question given this paragraph: Metallic character refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities. By following the trend summary in the figure below, you can see that the most reactive metals would reside in the lower left portion of the periodic table. The most reactive metal is cesium, which is not found in nature as a free element. It reacts explosively with water and will ignite spontaneously in air. Francium is below cesium in the alkali metal group, but is so rare that most of its properties have never been observed. Q: Do metals tend to gain electrons or lose electrons in chemical reactions? Choices: - develop electrons - same number of electrons - gain electrons - lose electrons A:
(Answer)
lose electrons
Ques: Answer the following question given this paragraph: Stem Cells A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells. Stem cells are divided into several categories according to their potential to differentiate. The first embryonic cells that arise from the division of the zygote are the ultimate stem cells; these stems cells are described as totipotent because they have the potential to differentiate into any of the cells needed to enable an organism to grow and develop. The embryonic cells that develop from totipotent stem cells and are precursors to the fundamental tissue layers of the embryo are classified as pluripotent. A pluripotent stem cell is one that has the potential to differentiate into any type of human tissue but cannot support the full development of an organism. These cells then become slightly more specialized, and are referred to as multipotent cells. A multipotent stem cell has the potential to differentiate into different types of cells within a given cell lineage or small number of lineages, such as a red blood cell or white blood cell. Finally, multipotent cells can become further specialized oligopotent cells. An oligopotent stem cell is limited to becoming one of a few different cell types. In contrast, a unipotent cell is fully specialized and can only reproduce to generate more of its own specific cell type. Stem cells are unique in that they can also continually divide and regenerate new stem cells instead of further specializing. There are different stem cells present at different stages of a human's life. They include the embryonic stem cells of the embryo, fetal stem cells of the fetus, and adult stem cells in the adult. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of skin. Adult bone marrow has three distinct types of stem cells: hematopoietic stem cells, which give rise to red blood cells, white blood cells, and platelets... Q: A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into these? Choices: - clones - infectious cells - germ cells - specialized cells A:
Ans: specialized cells
(Q).
Answer the following question given this paragraph: Potential energy is the energy stored in an object because of its position or shape. It includes gravitational potential energy and elastic potential energy. Gravitational potential energy depends on an object's weight and height above the ground. Q: What type of energy is stored in an object because of its position or shape? Choices: - magnetic - mechanical - kinetic - potential A:
(A).
potential
Ques:Answer the following question given this paragraph: Magma composition determines both eruption type and volcano type. Q: What composition determines both eruption type and volcano type? Choices: - electrical - chemical - gas - magma A:

Ans:magma
Question: Answer the following question given this paragraph: mitochondria, myoglobin, and capillary networks in SO fibers. Endurance athletes have a high level of SO fibers relative to the other fiber types. Resistance exercise causes hypertrophy. Power-producing muscles have a higher number of FG fibers than of slow fibers. Strenuous exercise causes muscle cell damage that requires time to heal. Some athletes use performanceenhancing substances to enhance muscle performance. Muscle atrophy due to age is called sarcopenia and occurs as muscle fibers die and are replaced by connective and adipose tissue. Q: Muscle atrophy due to age is called what? Choices: - nymphomania - Increased Atrophy - pepinia - sarcopenia A:
Answer:
sarcopenia