Answer the following question given this paragraph: Q: Where does digestion begin? Choices: - spicule cavity - excretory system - oral cavity - gastrovascular cavity A:
gastrovascular cavity
Answer the following question given this paragraph: A supervolcano eruption took place at Lake Toba in northern Sumatra about 75,000 years ago ( Figure below ). This was the largest eruption in the past 25 million years. As much as 2,800 cubic kilometers of material was ejected into the atmosphere. The result was a 6- to 10-year volcanic winter. Some scientists think that only 10,000 humans survived worldwide. The numbers of other mammals also plummeted. Q: A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade? Choices: - volcano fall - volcanic summer - volcano spring - volcanic winter A:
volcanic winter
Q: Answer the following question given this paragraph: Microbes use chemicals to make food. The chemicals pour out of a crack on the ocean floor at a mid-ocean ridge. What consumers live in this ecosystem?. Q: What do microbes use to make food? Choices: - nitrogen - sunlight - plants - chemicals A:
A: chemicals
Question: Answer the following question given this paragraph: assigned a unique one-, two-, or three-letter symbol. The names of the elements are listed in the periodic table, along with their symbols, atomic numbers, and atomic masses. The chemistry of each element is determined by its number of protons and electrons. In a neutral atom, the number of electrons equals the number of protons. Q: The chemistry of each element is determined by its number of what? Choices: - nuclei and neutrons - protons and neutrons - electrons and neutrons - protons and electrons A:
Answer: protons and electrons
*Question*
Answer the following question given this paragraph: Functional Groups Functional groups are groups of atoms that occur within molecules and confer specific chemical properties to those molecules. They are found along the "carbon backbone" of macromolecules. This carbon backbone is formed by chains and/or rings of carbon atoms with the occasional substitution of an element such as nitrogen or oxygen. Molecules with other elements in their carbon backbone are substituted hydrocarbons. The functional groups in a macromolecule are usually attached to the carbon backbone at one or several different places along its chain and/or ring structure. Each of the four types of macromoleculesproteins, lipids, carbohydrates, and nucleic acidshas its own characteristic set of functional groups that contributes greatly to its differing chemical properties and its function in living organisms. Q: Functional groups are groups of atoms that occur within molecules and confer specific chemical properties to those molecules. they are found along the "carbon backbone" of what? Choices: - inorganic molecules - functional molecules - micromolecules - macromolecules A:
**Answer**
macromolecules
*Question*
Answer the following question given this paragraph: (a) When pyrimidine or purine and a sugar react to form a glycosidic bond, a nucleoside is produced. Adding a phosphoric acid group to the sugar of a nucleoside produces a nucleotide. (b) Nucleotides link together to form long polymeric chains. A DNA molecule consists of two such chains held together by hydrogen bonding between the purine and pyrimidine components on different chains. Mutations in the DNA of an organism may lead to the synthesis of defective proteins. Phenylketonuria (PKU), for example, is a condition caused by a defective enzyme. Left. Q: What links together to form long polymeric chains? Choices: - genes - lipids - peptides - nucleotides A:
**Answer**
nucleotides