Biology

A 14-year-old boy describes himself as feeling "down" all of the time for the past year. He remembers feeling better while he was at camp for 4 weeks during the summer; however, the depressed mood returned when he came home. He reports poor concentration, feelings of hopelessness, and low self-esteem but denies suicidal ideation or changes in his appetite or sleep. What is the most likely diagnosis?
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An increase in the concentration of enzyme will increase the reaction rate. An increase in the concentration of enzyme will increase the reaction rate. True False
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What could happen if the DNA replication process encounters an error while coding
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Which region of your midbrain plays a role in arousing you to a state of alertness when, for example, in the dark of your apartment you accidentally stumble over your roommate who has passed out on the floor?
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How does replication work?
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Josiah says this is a phylogenetic tree of the dinosaurs. Maleek says it is a cladogram of the dinosaurs. Who is correct? Josiah is correct. Maleek is correct. Both are correct. Neither is correct.
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Conditions on Earth influenced evolution and how biodiversity changed through time. Place the following events in order from earliest to most recent.a. Extinction of giant mammals like mastodons.b. Earth hit by large carbonaceous meteorite.c. Diversification and dominance of mammalsd. Cambarian explosione. Dominance of amphibiance.
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In which ways can the individual steps of this process be regulated to lead to higher or lower expression of a particular protein? Formulate hypotheses using terms such as: RNA, protein, stability, splicing, transport, translation, and efficiency.
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Among plants known as legumes (beans, peas, alfalfa, clover, ete.) the seeds are contained in a fruit that is itself called a legume, better known as a pod. Upon opening such pods, it is commonly observed that some ovules have become mature seeds, whereas other ovules have not. Thus, which of the following statements is (are) true? 1. The flowers that gave rise to such pods were not pollinated 2. Pollen tubes did not enter all of the ovules in such pods. 3. There was apparently not enough endosperm to distribute to all of the ovules in such pods. 4. The ovules that failed to develop into seeds were derived from sterile floral parts. 5. Fruit can develop, even if all ovules within have not been fertilized A) 1 only B) 1 and 5 C) 2 and 4 D) 2 and 5 2. Gymnosperms differ from both extinct and extant (living) ferns because they A) are woody B) have macrophylls. C) have pollen. D) have sporophylls.
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Why do predictions by the European weather model sometimes differ from predictions made by the American weather model?(1 point)The two models assimilate data differently using different equations.The two models use different types of data measurements.The two models are designed to model different types of weather.The two models focus on different parts of the world.
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Cyanobacteria in polar regions a. can only grow in open water. b. are limited to the summer months. c. provide the basis of ecosystems in the polar environments. d. can only grow in limited numbers.
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Understanding the structural and molecular interactions that induce shape and function for a protein has been an obstacle for some of your students. You decide to plan a lesson to introduce them to the basic amino acid structure and then use that concept to introduce the different levels of protein structure. To reinforce your lesson on amino acids, you need to aid the students in understanding that most naturally occurring amino acids have a shared base structure. Each amino acid has an amine group, an alpha-carbon (or central carbon), an R-side group, and a carboxyl group. The R-side group is what gives each amino acid its distinctive characteristics--for example, whether the amino acid will be acidic or basic, hydrophilic or hydrophobic, or charged.
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In a resting state, sodium (Na^+) is at a higher concentration outside the cell and potassium (K^+) is more concentrated inside the cell. During an action potential, the sodium levels ________ inside the cell. Multiple Choice:A. decrease B. increase C. increase only if potassium levels remain the same D. stay the same
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Biology DNA: -The bases match up as follows;
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Carbon atoms can form...A) one double covalent bondB) two triple covalent bondsC) four single covalent bonds D) three double covalent bonds
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ocean acidification and its relationship to pH ahi1
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Renew an external counter pulsation device, works almost like a second _____, pumping blood througout the body. According to Sir David Lane, it's important to get blood pumping because circulation not only bring nutriens to the body also (finish the sentence)
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Explain why the soil doesnt qualify as an organism despite containing billions of living cells
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please help!!why is asexual reproduction within our own bodies necessary for survival?
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A _____ is an ancestor to chloroplast.A) Aerobic BacteriaB) Anaerobic BacteriaC) Mitochondria D) Animal Cell
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Which is a type of irradiation used to prevent food-borne illnesses?
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The Punnett square below shows the results of a cross to produce F2 generation plants. In the F2 generation, what percent of the offspring have white flowers?
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A potential difference of 122 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
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The Golgi complex functions to:______A) modify and secrete proteins to the external environment.B) sort proteins used within the cell.C) both modify and sort proteins into those destined for secretion and those that function in membrane structures.D) synthesize proteins.
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