Answer the following question given this paragraph: Comets carry materials in from the outer solar system. Comets may have brought water into the early Earth. Other substances could also have come from comets. Q: What is rusting an example of? Choices: - radiation change - Decomposition - contamination change - chemical change A:
chemical change
Answer the following question given this paragraph: There are three types of RNA involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribisomal RNA (rRNA). All three of these nucleic acids work together to produce a protein. The mRNA takes the genetic instructions from the nucleus to the cytoplasm, where the ribosomes are located. Ribosomes are the organelles where the proteins are made. The ribosomes themselves are made out of rRNA and other proteins. The mRNA binds to the ribosome, bringing the genetic instructions to order the amino acids to the site of protein synthesis. Finally, the tRNA brings the correct amino acid to the ribosome ( Figure below and Figure below ). In mRNA, the four nucleotides (A, C, G, and U) are arranged into codons of three bases each. Each codon encodes for a specific amino acid, except for the stop codons , which terminate protein synthesis. tRNA, which has a specific "3-leaf clover structure," contains a three base region called the anticodon , which can base pair to the corresponding three-base codon region on mRNA. More will be discussed on these processes in the Protein Synthesis: The Genetic Code (Advanced) and Protein Synthesis: Translation (Advanced) concepts. Q: What are the three types of rna involved in protein synthesis? Choices: - messenger, organic and transfer - messenger, transfer, and organic - organic , transfer , and ribosomal - messenger, transfer, and ribosomal A:
messenger, transfer, and ribosomal
Q: Answer the following question given this paragraph: Floods are a natural part of the water cycle, but they can cause a lot of damage. Farms and homes may be lost, and people may die. In 1939, millions of people died in a flood in China. Although freshwater is needed to grow crops and just to live, too much freshwater in the same place at once can be deadly. Q: What natural part of the water cycle can cause damage and death? Choices: - clouds - evaporation - expiration - floods A:
A: floods
Question: Answer the following question given this paragraph: Respiratory tree: terminates in alveolus, alveoli. Respiratory bronchioles branch into alveolar ducts and into alveoli. Alveolus: microscopic air sacs, 300 million of these in human lungs. Total surface area large. Gas diffuses micrometer, very tiny distance. Nervous System Composed of tissues designed to integrate sensory information and direct a coordinated response to the environment. Basic unit of the nervous system is the neuron1 , a highly specialized cell that uses both electrical and chemical processes to communicate. Neurons "listen" to sensory organs or other neurons, and can simultaneously "hear" from 1 to hundreds of inputs simultaneously. Likewise, a neuron can "talk" to other neurons or cells that can create an action, like muscle cells or glands. Neurons are outnumbered in the nervous system by glia. Glia were once thought to only play a supportive role in helping neurons survive; today we know that they also are important participants in the communication process. Glial cells include astrocytes, ependymal cells, and a cell that has a macrophage like function. There are also oligodendocytes and Schwann cells that provide a myelin sheath. Q: Alveoli can be found in which organ in the human body? Choices: - Stomach - Liver - Heart - lungs A:
Answer: lungs
*Question*
Answer the following question given this paragraph: During adolescence, testosterone causes most of the changes associated with puberty. It causes the reproductive organs to mature. It also causes other adult male traits to develop. For example, it causes the voice to deepen and facial hair to start growing. Q: During adolescence, what causes most of the changes associated with puberty? Choices: - estrogen - nicotine - methane - testosterone A:
**Answer**
testosterone
(Q).
Answer the following question given this paragraph: Microwaves are used for cell phones and radar. Q: Which types of waves are used for cell phones and radar? Choices: - light waves - thermal waves - sound waves - microwaves A:
(A).
microwaves