Answer the following question given this paragraph: Early in the development of a human fetus, the skeleton is made entirely of cartilage. The relatively soft cartilage gradually changes to hard bone through ossification. This is a process in which mineral deposits replace cartilage in bone. At birth, several areas of cartilage remain, including the ends of the long bones in the arms and legs. This allows these bones to keep growing in length during childhood. Q: Early in the development of a human fetus, the skeleton is made entirely of what? Choices: - bones - anterior - membrane - cartilage A:
cartilage
Answer the following question given this paragraph: An ecosystem consists of all the populations in a given area, together with the nonliving environment. Q: What is the name for something that consists of all the population in a given area together with the nonliving environment? Choices: - web - totality - habitat - ecosystem A:
ecosystem
Q: Answer the following question given this paragraph: Binary Fission Due to the relative simplicity of the prokaryotes, the cell division process, called binary fission, is a less complicated and much more rapid process than cell division in eukaryotes. The single, circular DNA chromosome of bacteria is not enclosed in a nucleus, but instead occupies a specific location, the nucleoid, within the cell (Figure 10.2). Although the DNA of the nucleoid is associated with proteins that aid in packaging the molecule into a compact size, there are no histone proteins and thus no nucleosomes in prokaryotes. The packing proteins of bacteria are, however, related to the cohesin and condensin proteins involved in the chromosome compaction of eukaryotes. The bacterial chromosome is attached to the plasma membrane at about the midpoint of the cell. The starting point of replication, the origin, is close to the binding site of the chromosome to the plasma membrane (Figure 10.15). Replication of the DNA is bidirectional, moving away from the origin on both strands of the loop simultaneously. As the new double strands are formed, each origin point moves away from the cell wall attachment toward the opposite ends of the cell. As the cell elongates, the growing membrane aids in the transport of the chromosomes. After the chromosomes have cleared the midpoint of the elongated cell, cytoplasmic separation begins. The formation of a ring composed of repeating units of a protein called FtsZ directs the partition between the nucleoids. Formation of the FtsZ ring triggers the accumulation of other proteins that work together to recruit new membrane and cell wall materials to the site. A septum is formed between the nucleoids, extending gradually from the periphery toward the center of the cell. When the new cell walls are in place, the daughter cells separate. Q: The single circular dna chromosome of bacteria is not enclosed in what, but instead occupies a specific location called the nucleoid within the cell? Choices: - atom - molecules - protons - nucleus A:
A: nucleus
Question: Answer the following question given this paragraph: The metallic bonding model explains the physical properties of metals. Metals conduct electricity and heat very well because of their free-flowing electrons. As electrons enter one end of a piece of metal, an equal number of electrons flow outward from the other end. When light is shone on to the surface of a metal, its electrons absorb small amounts of energy and become excited into one of its many empty orbitals. The electrons immediately fall back down to lower energy levels and emit light. This process is responsible for the high luster of metals. Q: Why does metal conduct heat and electricity so well? Choices: - electromagnetism - free flowing photons - insulation - free flowing electrons A:
Answer: free flowing electrons
*Question*
Answer the following question given this paragraph: Chromatography involves solvent separation on a solid medium. Q: Which process involves solvent separation on a solid medium? Choices: - substration - resonance - affinity - chromatography A:
**Answer**
chromatography
Q: Answer the following question given this paragraph: The first year of life after birth is called infancy. During infancy, a baby grows very quickly. The baby's length typically doubles and her weight triples by her first birthday. Many other important changes also occur during infancy:. Q: What is the first year of life following birth called? Choices: - baby - childhood - toddler - infancy A:
A: infancy