Natural sciences: Work summary 04.28.2023

  1. What is a lens? Lens — a phenomenon made to be seen.
  2. When is light refracted? To move from one transparent environment to another transparent environment
    when light is refracted
  3. Which point is called the focal point of the lens?
  4. Name the types of mirrors
  5. What are autonomic organs and what are their functions?
  6. They ensure plant nutrition, respiration, growth and development, as well as vegetative reproduction.
  7. 2. What are the generative organs of plants and what are their functions?
  8. Flowers, fruit and seeds are the generative reproductive organs of a plant.
  9. What is the function of roots? This plant attaches to the soil through roots. Consists of main, additional and lateral roots.
  10. What root modifications do you know?
  11. What is a photo shoot? What is the main function of photography?
  12. What function does the rod perform?
  13. What is the importance of leaves? Q:apparentlyis one of the most important organs in plants.

What is a cell?

Cells are the structural unit of which all living organisms are composed.

What are the main chemical elements that make up cells?

The cells of all types of living organisms are composed of chemical elements found in non-living nature. carbon (C), hydrogen (H), oxygen (O), nitrogen (N) dominate.

What are the main structural parts of a cell?

Nucleated cells consist of a cell membrane, cytoplasm and nucleus.

What is the importance of cell membranes?

The cell membrane delimits the cell from the environment, gives it a certain shape, protects it from environmental influences, and ensures the exchange of substances with the environment.

What is tissue?

A group of cells that have the same shape, structure, origin, perform the same function and are connected to each other by means of intercellular material is called tissue.

What tissues do sprouts have?

Plant tissues are: generating, covering, basic, transporting, mechanical.

What animal tissues do you know?

There are four types of tissue in animal organisms: epithelial, connective, muscle, and nerve.

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