Keystones Prep Warm-Ups. These warm-ups are separated by content/units. . Scientific Method & Experimentation.
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Keystones Prep Warm-Ups These warm-ups are separated by content/units.
A student conducted an experiment to determine if listening to different types of music would affect pulse rate. She thought that pulse rate would change with different types of music. Each person participating in her experiment listened to seven different selections of music for 30 seconds each. The pulse rates were taken after each 30-second interval of music. Based on her experiment, the student concluded that a person's pulse rate changed when listening to different types of music.The component missing from this experiment is a:(1) prediction(2) hypothesis(3) control group(4) research plan
An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the:(1) type of soda given to each group(2) amount of soda given to each group(3) pulse rate of each group(4) age of participants in each group
Which statement best describes a controlled experiment? (1) It eliminates the need for dependent variables.(2) It shows the effect of a dependent variable on an independent variable.(3) It avoids the use of variables.(4) It tests the effect of a single independent variable.
The graph below represents the growth of bacteria cultured at three different temperatures over a period of 24 hours. Which statement concerning the rate of cell division in the bacteria culture is correct?(1) Cell division is most rapid at 37ºC between 6 and 8 hours after it began.(2) Cell division is most rapid at 25ºC between 20 and 24 hours after it began.(3) Cell division is most rapid at 18ºC between 4 and 8 hours after it began.(4) Cell division occurs at the same rate no matter what the temperature.
What is the approximate length of the earthworm shown in the diagram below? (1) 9 mm (2) 10.6 cm (3) 90 mm (4) 106 cm
The development of an experimental researchplan should not include a: (1) list of safety precautions for the experiment (2) list of equipment needed for conducting theexperiment (3) procedure for the use of technologies neededfor the experiment (4) conclusion based on data expected to be collectedin the experiment
Which diagram best represents the levels of organization in the human body?
The chart below contains both autotrophic andheterotrophic organisms. Organisms that carry out only heterotrophicnutrition are found in:(1) row A, only (2) rows A and B(3) row B, only (4) rows A and C
The diagram below represents an incomplete section of a DNA molecule. The boxes represent unidentified bases. When the boxes are filled in, the total number of bases represented by the letter A (both inside and outside the boxes) will be (a) 1 (b) 3 (c) 2 (d) 4
The diagram below shows a normal gene sequence and three mutated sequences of a segment of DNA. Which row in the chart below correctly identifies the cause of each type of mutation?
If 15% of a DNA sample is made up of thymine, T, what percentage of the sample is made up of cytosine, C?(1) 15% (2) 35% (3) 70%(4) 85%
The diagram below shows some of the steps in protein synthesis. The section of DNA being used to make the strand of mRNA is known as a: (1) carbohydrate (2) ribosome(3) gene (4) chromosome
The diagram below represents the synthesis of a portion of a complex molecule in an organism. Which row in the chart could be used to identify the building blocks and product in the diagram?
What normally happens immediately after fertilization in sexual reproduction? (1) specialization of cells to form a fetus from an egg(2) production of daughter cells having twice the number of chromosomes as the parent cell(3) production of daughter cells having half the number of chromosomes as the parent cell(4) division of cells resulting in the development of an embryo from a zygote
The diagram below represents a plant cell in tap water as seen with a compound light microscope. Which diagram best represents the appearance of the cell after it has been placed in a 15% salt solution for two minutes?
The diagram below shows a process that affects chromosomes during meiosis. This process can be used to explain:(1) why some offspring are genetically identical to their parents(2) the process of differentiation in offspring(3) why some offspring physically resemble their parents(4) the origin of new combinations of traits in offspring
Which set of functions is directly controlled by the cell membrane? A. protein synthesis, respiration, digestion of food molecules B. active transport, recognition of chemical messages, protection C. enzyme production, elimination of large molecules, duplication of DNA codes D. release of ATP molecules, regulation of cell reproduction, food production
Energy from organic molecules can be stored inATP molecules as a direct result of the process of (1) cellular respiration(2) cellular reproduction(3) diffusion(4) digestion
A. The cells are produced by mitosis and contain all the genetic information of the father. B. If one of these cells fertilizes an egg, the offspring will be identical to the father. C. Each of these cells contains only half the genetic information necessary for the formation of an offspring. D. An egg fertilized by one of these cells will develop into a female with the same characteristics as the mother
The diagram shows the changes that occurred in a beaker after 30 minutes. The beaker contained water, food coloring, and a bag made from dialysis tubing membrane. When the colors yellow and blue are combined, they produce a green color. Which statement most likely describes the relative sizes of the yellow and blue food-coloring molecules in the diagram? (1) The yellow food-coloring molecules are small, while the blue food-coloring molecules are large. (2) The yellow food-coloring molecules are large, while the blue food-coloring molecules are small. (3) Both the yellow food-coloring molecules and the blue food-coloring molecules are large. (4) Both the yellow food-coloring molecules and the blue food-coloring molecules are small.
The diagram below represents a yeast cell that is in the process of budding, a form of asexual reproduction. Which statement describes the outcome of this process? (1) The bud will develop into a zygote.(2) The two cells that result will each contain half the species number of chromosomes.(3) The two cells that result will have identical DNA.(4) The bud will start to divide by the process of meiotic cell division.
After two hours, the color of the liquid in the beaker did not change. This shows that: (1) glucose moved from the artificial cell into the beaker (2) starch did not pass out of the artificial cell (3) starch was digested to glucose in the artificial cell (4) glucose molecules combined to produce starch in the artificial cell
1. Identify an organelle in cell A that is the site of autotrophic nutrition 2. Which statement best describes these cells? A. Cell B lacks vacuoles while cell A has them. B. DNA would not be found in either cell A or cell B. C. Both cell A and cell B use energy released from ATP. D. Both cell A and cell B produce antibiotics.
The diagram below represents two cells, X and Y. Which statement is correct concerning thestructure labeled A?(1) It aids in the removal of metabolic wastes inboth cell X and cell Y.(2) It is involved in cell communication in cell X,but not in cell Y.(3) It prevents the absorption of CO2 in cell Xand O2 in cell Y.(4) It represents the cell wall in cell X and thecell membrane in cell Y.
Which nuclear process is represented below? (1) recombination (2) fertilization (3) replication (4) mutation
The diagram below represents an event thatoccurs in the blood. Which statement best describes this event? Cell A is a white blood cell releasing antigensto destroy bacteria.(2) Cell A is a cancer cell produced by theimmune system and it is helping to preventdisease.(3) Cell A is a white blood cell engulfing disease- causing organisms.(4) Cell A is protecting bacteria so they canreproduce without being destroyed bypredators.
Which statement is true of both mitosis and meiosis?(1) Both are involved in asexual reproduction.(2) Both occur only in reproductive cells.(3) The number of chromosomes is reduced by half.(4) DNA replication occurs before the division of the nucleus.