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What two characteristics do all eukarotes share?
eukaryotes have nuclei and Golgi bodies
What is a description of Pseudostratified ciliated epithelium?
Pseudostratified ciliated epithelium is a type of epithelial tissue found in the respiratory tract. It appears to be stratified due to the nuclei being at different levels, but all cells are in contact with the basement membrane. Most of the cells have cilia on their apical surface, which help in moving debris and mucus out of the respiratory system.
What characteristics of all organisms and viruses are determined by the instructions are carried in?
nucleic acids
All leukocytes contain only a single nucleus so when observed under a microscope why does it appear that some of the leukocytes have more than one nucleus?
Some leukocytes, such as neutrophils, can have segmented nuclei that appear as multiple lobes. These segmented nuclei can give the appearance of multiple nuclei when observed under a microscope. This characteristic is known as polymorphism, and it is a normal feature of certain types of leukocytes.
A well stained leaf peel mount when observed under the high power of a microscope shows nuclei in?
A well-stained leaf peel mount observed under high power of a microscope will show nuclei in the plant cells. Nuclei in plant cells appear as darkly stained, round or oval structures within the cytoplasm of the cell, providing important genetic and regulatory functions for the plant cell.
What are the key characteristics of an onion cell as observed under a microscope?
The key characteristics of an onion cell observed under a microscope include a rectangular shape, a cell wall that appears as a thin, clear outline, a large central vacuole that takes up most of the cell's space, and small, dark-stained organelles called nuclei.
What two characteristics do all eukarotes share?
eukaryotes have nuclei and Golgi bodies
What is a description of Pseudostratified ciliated epithelium?
Pseudostratified ciliated epithelium is a type of epithelial tissue found in the respiratory tract. It appears to be stratified due to the nuclei being at different levels, but all cells are in contact with the basement membrane. Most of the cells have cilia on their apical surface, which help in moving debris and mucus out of the respiratory system.
What are pleomorphic nuclei?
Pleomorphic nuclei are irregularly shaped nuclei that vary in size and structure within a population of cells. This variation can be seen in cancer cells, where the nuclei may exhibit different shapes and sizes compared to normal cells. Pleomorphic nuclei are considered a feature of malignancy when observed in pathology samples.
Who first observed the fusion of light nuclei and in what year?
The fusion of light nuclei was first observed in 1938 by scientists Otto Hahn and Fritz Strassmann, along with physicist Lise Meitner. This experiment led to the discovery of nuclear fission, which laid the groundwork for nuclear energy and atomic weapons.
What characteristics of all organisms and viruses are determined by the instructions are carried in?
nucleic acids
All leukocytes contain only a single nucleus so when observed under a microscope why does it appear that some of the leukocytes have more than one nucleus?
Some leukocytes, such as neutrophils, can have segmented nuclei that appear as multiple lobes. These segmented nuclei can give the appearance of multiple nuclei when observed under a microscope. This characteristic is known as polymorphism, and it is a normal feature of certain types of leukocytes.
What is orthokeratin?
Stratum corneum (outermost layer of epidermis) with an increased keratin layer without residual nuclei and has an uneven surface. (NORMAL) Parakeratin has an increased keratin layer with shrunken (pyknotic) residual nuclei and a more even surface (ABNORMAL)
What is the role of nuclei in condensation?
Nuclei in condensation act as sites where water vapor molecules can come together and form droplets. These nuclei provide a surface for water vapor to condense onto, initiating the process of condensation. Without nuclei, condensation would have a harder time starting, and mist or fog formation would be delayed.
A well stained leaf peel mount when observed under the high power of a microscope shows nuclei in?
A well-stained leaf peel mount observed under high power of a microscope will show nuclei in the plant cells. Nuclei in plant cells appear as darkly stained, round or oval structures within the cytoplasm of the cell, providing important genetic and regulatory functions for the plant cell.
What organelles did robert Hooke see?
Robert Hooke observed and named cells, the basic unit of all living organisms. He also saw cell walls, vacuoles, and nuclei within the cells he observed using a microscope.
Which describes the process of processes in which freezing nuclei play a role?
The process you are referring to is called heterogeneous nucleation. In this process, freezing nuclei serve as sites where ice crystals can form, allowing the freezing of a liquid to begin more easily. These nuclei can be foreign particles or imperfections on the surface of the container, which provide a surface for ice crystals to form on.
