Ayuda con la tarea de biología
La parte más complicada de aprender biología es cómo hacer que los estudiantes comprendan el mundo microscópico de la biología, cómo entrar en las células y explorar genes y moléculas. Sin embargo, con el desarrollo de la tecnología de la información, la ayuda con la tarea de biología puede desempeñar un papel importante cuando ni las palabras ni las imágenes pueden explicar completamente los puntos de biología.
QuestionAI es un software de aprendizaje de biología en línea que le ayuda a aprender y dominar el conocimiento de la biología, incluida una variedad de experimentos y ejercicios correspondientes, que es fundamentalmente diferente del ayudante común de preguntas de biología. Aquí, puede simular experimentos para reproducir los escenarios experimentales, de superficial a profundo, capa por capa, para aprender y comprender los puntos de conocimiento.
- 1. A biologist is interested in studying the effect of growth-enhancing nutrients and different salinity (salt)of young tiger shrimp in water on the growth of shrimps. The biologist has ordered a large shipment in a shrimps from a supply house for use in the study. The experiment is to helps in a controlled environment. The biologist is planning to use 3 different growth-enhancing nutrients (A. B and C) and two different alinity levels (low and high). (a) List the treatments that the biologist plans to use in this experiment. (b) Explain how to decide which tank receives which treatment. (c) What is the response variable? (d) Give one statistical advantage to having only tiger shrimps in the experiment. Explain why this is an advantage. 2. A new headache remedy is given to a group of 25 patients who suffer severe headaches.Of these, 20 report that the remedy is very helpful in treating their headaches. From this information you conclude the remedy is effective for the treatment of headaches Which of the following best describes any inferences (conclusions) that might be made based on the data results? (A)No causal inference can be made because the sample size is too small. (B) No causal inference can be made because there is no control group for comparison. (C) No causal inference can be made since the headache relief is self-reported. (D) Causal inferences can be made since subjects were assigned to a treatment. (E) Causal inferences can be made since this is an experiment. 3. Which of the following is not required in an experimental design? (A) blocking (B) control (C) randomization
- 5. Compare the mutant DNA to the original DNA strand I to answer the question. Original DNA:CGG/TAT/TCA IGAC /TAA/AAG/CTT Mutant DNA: CGG/TA IT /CAG/ACT/AA A/AGC/TT What kind of mutation is this? Insertion Inversion D Deletion Substitution
- 4. Farmers spray pesticides on their plants to protect the plants from being eaten by insects. individual insects have a genetic mutation that makes them resistant to the toxins in the pesticides. Which statement best describes how only a few resistant Individuals resulted in the pesticide becoming Ineffective? F The resistant Insects change the toxin on the plants, making it safe for others. G The resistant Insects grow larger and eat less of the plants. H The resistant Insects eat the contaminated surface and leave the rest for others. J The resistant Insects are able to survive to reproduce and create a population that is also resistant.
- one that best answers the question or completes the statement. is followed by five suggested answers or completed believes that men and women may react to the shampoo differently. Additionally, the researcher believes believes that men and compare the effect of a new type of shampoo on hair condition The researcher that the shampoo will react differently on hair that is dyed. The subjects are split into four groups:men who dye their hair; men who do not dye their hair; women who dye their hair, women who do not dye (A) The experimentisacheroup are randomly assigned to the new shampoo and the old shampoo. (A) The experiment is a completely randomized design. (b) The experiment has three fictors (shanppoo type, gender, whether hair is dyed). (C) The experiment has two factors (gender and whether hair is dyed) and is blocked by shampoo type. (D) The experiment has two factors (shampoo type and whether hair is dyed) and is blocked by gender. (E) The experiment has one factor (shampoo type)and is blocked by both gender and whether hair is dyed. 2. A dog food company wishes to test a new high-protein formula for puppy food to determine whether it promotes faster weight gain than the existing formula for that puppy food. Pupples participating in an experiment will be weighted at weaning (when they begin to eat puppy food)and will be weighed at one- month intervals for one year. In designing this experiment, the investigators wish to reduce the variability due to natural differences in puppy growth rates.Which of the following strategies is most appropriate for accomplishing this? (A) Block on dog breed and randomly assign puppies to existing and new formula groups. (B) Block on geographic location and randomly assign puppies to existing and new formula groups. (C) Stratify on dog breed and randomly sample puppies within each breed. Then assign puppies by breed to either the existing or the new formula. (D) Stratify on geographic location of the puppies and randomly sample puppies within each geographic area. Then assign puppies by geographic area of either the existing or the new formula. 3. A large simple random sample of people aged nineteen to thirty living in the state of Colorado was surveyed to determine which of two MP3 players just developed by a new company was preferred . To which of the following populations can the results of this survey be safely generalized? (A) Only people aged nineteen to thirty living in the state of Colorado who were in this survey (B) Only people aged nineteen to thirty living in the state of Colorado (C) All people living in the state of Colorado (D) Only people aged nineteen to thirty living in the United States (E) All people living in the United States new restaurant is interested in determining the best time-temperature combination for roasting a five- pound cut of lamb.The times to be tested are 45 minutes,60 minutes, and 90 minutes at temperatures of 350 degrees Fahrenheit and 425 degrees Fahrenheit for each time, with the exception of the 90 minute- 425 degree combination. That combination is being eliminated because it will overcook the lamb, which leaves five combinations remaining From the 10 identical cuts of lamb, 2 are randomly selected to roas using each of the time-emperature combinations in the same oven. The quality of the finished product i evaluated for each roast.Which of the following is true? (A) The explanatory variable is the quality of the finished lamb. (B) The response variable is the roasting temperature for the lamb. (C) If the experiment is repeated, identical results will be expected. (D)There should be a control group (i.e., a group in which no treatment is given. (D) The two cuts that are being roasted for each time-temperature combination are an example of replication.
- 3. Conservation biologists studying chestal populations have determined that the lack of goners. diversity among the cheetahs is due to Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population? . The chances of a mutation occurring in the cheetah population are decreased increasing the cheetah survival rate. a The gene pool remains in equilibrium and future generations of cheatah offogring are stronger and better adapted to their environments. H The cheetah population becomes less likely to survive an outbreak of a disease on an environmental change, horeasing the chance of spedes extinction , Genetic variability is maintained from older cheetah populations that have survived and endured environmental stressors.
