Answer the following question given this paragraph: The sugar of one nucleotide binds to the phosphate group of the next nucleotide. Alternating sugars and phosphate groups form the backbone of a nucleotide chain, as shown in Figure below . The bases, which are bound to the sugars, protrude from the backbone of the chain. In DNA, pairs of bases-one from each of two nucleotides-form the middle section of the molecule. Q: The sugar of one nucleotide binds to what group of the next nucleotide? Choices: - the alkaline - the chloride - the protein - the phosphate A:
the phosphate
Answer the following question given this paragraph: In some soils, the organic portion is entirely missing. This is true of desert sand. At the other extreme, a soil may be completely organic. Peat, found in a bog or swamp, is totally organic soil. Organic materials are necessary for a soil to be fertile. The organic portion provides the nutrients needed for strong plant growth. Q: Will contour lines ever cross? Choices: - yes - in rare cases - always - no A:
no
Q: Answer the following question given this paragraph: Skeletal system problems include fractures, osteoarthritis, and rickets. Q: Fractures, osteoarthritis, and rickets are problems of which body system? Choices: - digestive system - circulatory system - cardiovascular system - skeletal system A:
A: skeletal system
Question: Answer the following question given this paragraph: Light may be absorbed by matter. This is called absorption of light. When light is absorbed, it doesn't reflect from or pass through matter. Instead, its energy is transferred to particles of matter, which may increase the temperature of matter. Q: When light is absorbed by a material, what may increase? Choices: - happiness - weight - mass - its temperature A:
Answer: its temperature
*Question*
Answer the following question given this paragraph: Producers are organisms that produce food for themselves and other organisms. They use energy and simple inorganic molecules to make organic compounds. The stability of producers is vital to ecosystems because all organisms need organic molecules. Producers are also called autotrophs . There are two basic types of autotrophs: photoautotrophs and chemoautotrophs. Q: Photoautotrophs and chemoautotrophs are two basic types of what? Choices: - plants - consumers - decomposers - autotrophs A:
**Answer**
autotrophs
Answer the following question given this paragraph: Because the nuclei of each H atom contain protons, the electrons in the bond are attracted to the nuclei (opposite charges attract). But because the two atoms involved in the covalent bond are both H atoms, each nucleus attracts the electrons by the same amount. Thus the electron pair is equally shared by the two atoms. The equal sharing of electrons in a covalent bond is called a nonpolar covalent bond. Now consider the HF molecule:. Q: Because the nuclei of each h atom contain protons, the electrons in the bond are attracted to the nuclei (opposite charges attract). but because the two atoms involved in the covalent bond are both h atoms, each nucleus attracts the electrons by the same amount. thus the electron pair is equally shared by these? Choices: - four atoms - one atom - nine atoms - two atoms A:
two atoms