Answer the following question given this paragraph: The two atoms that are held together in a covalent bond may be atoms of the same element or different elements. When atoms of different elements bond together, it forms a covalent compound. Q: What is formed when atoms of different elements bond together? Choices: - univalent compound - phenotype compound - duality compound - covalent compound A:
covalent compound
Answer the following question given this paragraph: Q: What's the process responsible for the presence of oxygen in our atmosphere? Choices: - respiration - ozone - glycolysis - photosynthesis A:
photosynthesis
Q: Answer the following question given this paragraph: Plants and animals exist in a cycle; each requires products of the other. The thousands of coordinated chemical reactions that keep cells alive are referred to collectively as metabolism. In general, metabolic reactions are divided into two classes: the breaking down of molecules to obtain energy is catabolism, and the building of new molecules needed by living systems is anabolism. Q: What is the term for the metabolic reaction where living systems build new molecules? Choices: - symbolism - connectionism - metabolism - anabolism A:
A: anabolism
Question: Answer the following question given this paragraph: Roots are important organs in all vascular plants. Most vascular plants have two types of roots: primary roots that grow downward and secondary roots that branch out to the side. Together, all the roots of a plant make up a root system . Q: In vascular plants, do primary roots grow downward or to the side? Choices: - to the side - neither - it depends - downward A:
Answer: downward
*Question*
Answer the following question given this paragraph: Milk and other dairy foods are not the only sources of calcium. This important nutrient is also found in green leafy vegetables, broccoli, and intact salmon and canned sardines with their soft bones. Nuts, beans, seeds, and shellfish provide calcium in smaller quantities. Except for fatty fish like salmon and tuna, or fortified milk or cereal, vitamin D is not found naturally in many foods. The action of sunlight on the skin triggers the body to produce its own vitamin D (Figure 6.22), but many people, especially those of darker complexion and those living in northern latitudes where the sun's rays are not as strong, are deficient in vitamin D. In cases of deficiency, a doctor can prescribe a vitamin D supplement. Q: The action of sunlight on the skin triggers the body to produce what vitamin? Choices: - Vitamin A - metabolic d - tissue d - vitamin d A:
**Answer**
vitamin d
*Question*
Answer the following question given this paragraph: Membranes Biological membranes surround cells and serve to keep the insides separated from the outsides. They are formed of phospholipid bilayer1 s, which by definition are a double layer of fatty acid2 molecules (mostly phospholipid3 s, lipids containing lots of phosphorus). Proteins4 serve very important functions in cellular membranes. They are active transports in and out of the cell, acting as gatekeepers. They relay signals in and out of the cell. Proteins are the site of many enzymatic reactions in the cell, and play a role in regulation of cellular processes. Q: What is it that surrounds cells and serve to keep the insides separated from the outsides? Choices: - inner membranes - abundant membranes - similar membranes - biological membranes A:
**Answer**
biological membranes