Answer the following question given this paragraph: Dutch elm trees used to be common, beautiful trees in the United States. Now most of them, like this tree, have been killed by Dutch elm disease. Dutch elm disease is caused by a fungus. This is just one example of how fungi can interact with other species. Q: Dutch elm trees used to be common, beautiful trees in the united states. now most of them have been killed by what? Choices: - carbon dioxide - beetles - cancer - dutch elm disease A:
dutch elm disease
(Question)
Answer the following question given this paragraph: Watch this video (http://openstaxcollege. org/l/pollen_release) to see a cedar releasing its pollen in the wind. Female Gametophyte The female cone also has a central axis on which bracts known as megasporophylls (Figure 32.10) are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium. Q: What does the megaspore mother cell produce after meiosis division? Choices: - four diploid megaspores - two diploid megapores - two haploid megaspores - four haploid megaspores A:
(Answer)
four haploid megaspores
Ques: Answer the following question given this paragraph: In stage two, the pyruvate molecules are transported into the mitochondria. The mitochondria are the organelles known as the energy "powerhouses" of the cells ( Figure below ). In the mitochondria, the pyruvate, which have been converted into a 2-carbon molecule, enter the Krebs cycle. Notice that mitochondria have an inner membrane with many folds, called cristae . These cristae greatly increase the membrane surface area where many of the cellular respiration reactions take place. Q: What organelles are known as the energy "powerhouses" of the cells? Choices: - proteins - atoms - carbohydrates - mitochondria A:
Ans: mitochondria
(Q).
Answer the following question given this paragraph: Introduction Each somatic cell in the body generally contains the same DNA. A few exceptions include red blood cells, which contain no DNA in their mature state, and some immune system cells that rearrange their DNA while producing antibodies. In general, however, the genes that determine whether you have green eyes, brown hair, and how fast you metabolize food are the same in the cells in your eyes and your liver, even though these organs function quite differently. If each cell has the same DNA, how is it that cells or organs are different? Why do cells in the eye differ so dramatically from cells in the liver? Whereas each cell shares the same genome and DNA sequence, each cell does not turn on, or express, the same set of genes. Each cell type needs a different set of proteins to perform its function. Therefore, only a small subset of proteins is expressed in a cell. For the proteins to be expressed, the DNA must be transcribed into RNA and the RNA must be translated into protein. In a given cell type, not all genes encoded in the DNA are transcribed into RNA or translated into protein because specific cells in our body have specific functions. Specialized proteins that make up the eye (iris, lens, and cornea) are only expressed in the eye, whereas the specialized proteins in the heart (pacemaker cells, heart muscle, and valves) are only expressed in the heart. At any given time, only a subset of all of the genes encoded by our DNA are expressed and translated into proteins. The expression of specific genes is a highly regulated process with many levels and stages of control. This complexity ensures the proper expression in the proper cell at the proper time. Q: Whereas each cell shares the same genome and dna sequence, each cell does not turn on, or express, the same set of what? Choices: - babies - eggs - balls - genes A:
(A).
genes
Ques:Answer the following question given this paragraph: "Cardio" has become slang for aerobic exercise that raises your heart rate for an extended amount of time. Cardio can include biking, running, or swimming. Can you guess one of the main organs of the cardiovascular system? Yes, your heart. Q: "cardio" has become slang for what type of exercise that raises your heart rate for an extended amount of time? Choices: - cyclical - kinetic - anaerobic - aerobic A:

Ans:aerobic
Ques:Answer the following question given this paragraph: What is this strange-looking object? Can you guess what it is? It's a model of a certain type of matter. Some types of matter are elements, or pure substances that cannot be broken down into simpler substances. Many other types of matter are compounds. The model above represents a compound. The compound it represents is carbon dioxide, a gas you exhale each time you breathe. Q: Which gas do people exhale during each breath? Choices: - carbon monoxide - nitrogen - oxygen - carbon dioxide A:

Ans:
carbon dioxide