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.
- 3) What color of bugs do birds prefer to eat? A: White B: Green C: Red D: Both B and C
- 3) What color of bugs do birds prefer to eat? A: White B: Green C: Red D: Both B and c
- If apex predators are a game species they are considered big game. true felse true false
- 3. Zebrafish are an organism capable of heart regeneration. Since heart disease is a leading cause of death in the United States, understanding the mechanisms of zebrafish heart regeneration could lead to new therapies for humans. In a recent study, researchers investigated the role of autophytes. Autophygi is a process where cells break down and recycle damaged components, which supports healthy cell cycle progression and tissue repair. Autophygi is linked to cell cycle regulation by providing the necessary cellular resources and removing damaged cells that could disrupt normal cell division. This process is especially important during tissue repair, like when the heart is regenerating. (a) Identify the cellular organelle that contains the hydrolytic enzymes important in autophygi: intracellular digestion, recycling of cell materials, and programmed cell death (apotosis). (I/P) To study autophygi in zebrafish hearts, scientists used a method called Westem blotting. Western blotting starts with gel electrophoresis, where proteins are separated as they move through a gel. Once the proteins are separated, they are transferred to a special membrane. Scientists then use antibodies that bind to specific proteins, which are later visualized as bands. The darker or more intense the band, the higher the amount of that protein in the sample. (b) Gel electrophoresis is a laboratory method used to separate DNA fragments, RNA, or proteins. Describe how gel electrophoresis separates molecules as they move through the gel matrix. (I/P) In this study, the researchers measured three important proteins related to autophagy: Becilin, which starts the process and helps cells divide; L-C3,1, in theactive form of LC3; II, the active form that signals autophagy. The results of the Westem bar also shown in Figure 1. GAPDL was used as a loading control, a way to make sure the protein amounts were accurately compared across all samples. "S" stands for sham-treated hearts (uninjured), and "A" stands for amputated hearts (injured). The researchers checked protein levels at different days after injury, called days post-amputation (dpa). The results of the Western blue reveal how autophagy-related proteins change over time after heart injury. This gives scientists clues about how autophagy helps zebrafish heal their hearts. Figure 1: Western blot analysis of Beclin-1, LC3-1, and LC3II levels at 3 dpa, 7 dpa, and 28 dpa. (c) (i) Identify the time point(s) (3,7 , or 28 dpa) with the largest difference in LC3-II levels between sham (S) and mputated (A) hearts? (I p) (ii) Based on the results of the Western blot, determine the timeline of autophagy activation and completion during zebrafish heart regeneration. (I pt) (d) Recent research suggests that the regulation of autophagy-related genes may be linked to histone modifications, like methylation and acetylation. Explain how histone modifications affect gene expression. (I pt)
- 2) Which of the following give an organism a more favorable advantage and more likely will be passed on to an offspring? A: All traits B: Survival traits C: Natural traits D: Favorable traits
