The chromosomes in the rose nucleus occur in sets of seven. Some roses have two sets of seven, or 14 chromosomes, while others have 21 (three sets of 7) or 28 (four sets of seven) chromosomes, respectively.
What is the function of nucleus in plant cell?
The nucleus is where DNA is housed in the cells of plants. A nucleus consists of the cell’s DNA and a nucleolus which are surrounded by a double membrane . The double membrane that surrounds the nucleus is called the nuclear envelope. The nucleolus is the largest structure in the nucleus and is responsible for the production of ribosomes.
Prokaryotes do not have a nucleus as these are single-celled creatures that lack a nucleus and other organelles that are attached to membranes. Prokaryotes do have their genomic DNA concentrated and localized to a small area within the cell which is called nucleoid.
One of the next things we wondered was, do animal cells have a nucleus and organelles?
Animal cells also have a nucleus and organelles but lack a cell wall and have a different set of organelles. The nucleus is where DNA is housed in the cells of plants. A nucleus consists of the cell’s DNA and a nucleolus which are surrounded by a double membrane. The double membrane that surrounds the nucleus is called the nuclear envelope.
What type of cells are found in STEM and roots?
Cells of stems and roots. The majority of stem cells are a relatively featureless type of cell called a ‘parenchyma’ cell. Vascular tissues are bunched together into bundles with xylem cells and phloem cells sitting next to each other.
What are the rows on the periodic table called?
The rows on the table are known as periods, and the columns are known as groups. Elements in certain groups tend to share characteristics. For example, elements in Group 1, including lithium, sodium and potassium, are known as the alkali metals.
The Periodic Table is organized according to atomic number, which is equal to the number of protons found in the nuclei of an element’s atoms. The rows on the table are known as periods, and the columns are known as groups. Elements in certain groups tend to share characteristics.
The period number tells you how many shells a atom has. Ex; Curium’s period number is 7, so it has seven shells. 🙂 What does a group number on the periodic table tell us?
What is the importance of groups and periods on the periodic table?
The groups and periods are very important on the Periodic table. The elements are arranged according to their atomic number on the modern periodic table.