1.1. Photosynthesis and cell respiration they are chemically opposite
Plants use sunlight as a source of energy. With the energy of the sun, plants use carbon dioxide (CO2) and water (H2O) to make sugars called carbohydrates. This reaction is called photosynthesis.
CO2 + H2O + light energy => O2 + sugar (carbohydrates)
Cellular respiration is a chemical reaction found in animal and plant cells.
Cellular respiration transforms carbohydrates (food) into cellular energy that the cell uses to perform all of its functions.
The reaction is as follows:
6*O2 + glucose => 6*CO2 + 6*H2O.
1.2 they have a relationship to each other
Photosynthesis and cellular respiration are the phenomena that organisms have to obtain energy for their activities. We distinguish two kinds of organisms: heterotrophs and autotrophs.
photosynthesis and cellular respiration is a cycle that depends on each other (the products of one are the reagents of the other).
2.1 Skin cells divide by mitosis.
The somatic cells of our body are divided by mitosis. Somatic cells make up most of the tissues and organs in our bodies - skin, muscles, lungs, intestines, and so on.
Somatic cells are diploid (each has two sets of chromosomes). By mitosis, the genetic material (chromosomes and DNA) of the mother cell is unchanged in each of the daughter cells, which are also diploid.
2.2 The interphase
The interphase is thus the period of the cell cycle during which the nucleus is not dividing, typically intervening between mitotic or meiotic divisions.
Otherwise expressed, interphases are steps in the development of subsequent mitosis or cell meiosis, during which the nucleus is not dividing. In the cells that will undergo further division, the DNA in the nucleus is duplicated for next division during phase S, and the proteins involved in mitosis are synthesized in phase G2.
2.3 Mitosis and cytokinesis
Mitosis is a process involved in the nucleus of eukaryotic cells and immediately preceding cell division, consisting of the equitable distribution of hereditary material (characteristic DNA). This type of division occurs in somatic cells and usually ends with the formation of two distinct nuclei (mitosis), followed by cytoplasmic separation (cytokinesis) to form two daughter cells.
Cytokinesis refers to a division of the cytoplasm that usually follows the division of the nucleus at the end of the mitosis. It is the process by which the cytoplasm of a eukaryotic cell divides into two cells
