Answer and Explanation:
The human being has a bone system made up of 206 bones that grow and develop in childhood and adolescence. Thanks to these bones, people can stand up and move around. The function of the bone system is to support the body, allow locomotion, and protect the organs. The bones that make up the system are linked through joints and are made up of a class of cells known as osteocytes.
The bones form various cavities that protect the internal organs from possible trauma. For example, the skull protects the brain from hits, and the rib cage, made up of ribs and sternum, protects the lungs and heart. On the other hand, various minerals such as calcium and phosphorus are stored in the bones, not only to provide them with hardness, but to later use them as an input in muscle contraction and other organic processes
Deforestation, pollution and loss of natural resources all are possible due to human involvement in devastating the environment i.e. urban sprawl. Thus, correct answer is option D.
Further Explanation:
Urban sprawl is another word used for urbanization. This refers to the migration of the population from the populated towns as well as cities to the reduced density of residential development. This shift generally leads to reduction of natural resources and supplies. The final result is the spreading of a city over more and more rural land. This refers to the expansion of poorly planned and low-density development. This spreads over large amounts of land and puts long distances between storage home and work, and thus, creates high segregation between commercial and residential uses having harmful impacts on the individuals living in such regions. The wildlife and ecosystems are displaced.
Some argue that this has its benefits like making local economic growth. However, it has many uninvited consequences for the environment as well as residents like higher water and air pollution, elevated jams and fatalities in traffic, and loss of agricultural capacity. There is also an increased car dependency.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Human intervention and environment
Keywords:
Negative consequences, urban sprawl, car dependency, traffic jams, fatalities, pollution
b. metaphase and telophase
c. anaphase and metaphase
d. metaphase and prophase E. interphase and telophase
Mitosis consists of four phases - prophase, metaphase, anaphase, telophase and cytokinesis.1. Prophase: Chromatin in the nucleus condenses and chromosomes pair up. Mitosis consists of four phases - prophase, metaphase, anaphase, telophase and cytokinesis
1. Prophase: Chromatin in the nucleus condenses and chromosomes pair up
2. Metaphase: Chromosomes line up at the center of the cell. The sister chromatids are joined together.
3. Anaphase: The sister chromatids separate from each other to the opposite sides of the cells.
4. Telophase and Cytokinesis: Membrane forms around each set of chromosomes on two opposite sides of the cells and cell divides into two identical daughter cells.
Therefore, chromatids are present in metaphase and anaphase. In prophase structures are called chromonema.
Cytokinesis is the final stage of cell division where the cytoplasm is divided to form two separate daughter cells. This follows after the completion of interphase and the four stages of mitosis. This stage ensures all genetic material, organelles, and cytoplasm are evenly divided.
The final stage of cell division where the cytoplasm is divided among the two new daughter cells is called cytokinesis. In the process of cell division, a cell first undergoes interphase, prepares for cell division and moves through four stages of mitosis (prophase, metaphase, anaphase, and telophase). Following this, the cell proceeds to the final stage of mitosis - telophase, where two new daughter nuclei are formed at either end of the cell.
These new nuclei surround the genetic material, which then uncoils, allowing the chromosomes to return to loosely packed chromatin. Once nuclei are formed, the cell begins to split in half, a process known as cytokinesis. This is where the cytoplasm, the internal material between the cell membrane and nucleus, is divided to form two separate daughter cells. This process also ensures that all other organelles and cellular solutes are evenly distributed between the two daughter cells.
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B. Tumour cells and B-cells
C. B-cells and T-cells
D. Antibodies and antigens