A stem cell is a cell with the unique ability to develop into specialised cell types in the body. In the future, they may be used to replace cells and tissues that have been damaged or lost due to disease.
Get ready for the upcoming exam with the following practice questions on the chapter “Life Processes”. These questions cover all the concepts given in the NCERT text and are sourced from previous year questions, CBSE sample papers, and certain other sources. Continue reading
Cells are the basic building blocks of living things. The human body is composed of trillions of cells, all with their own specialised function.
The set of mechanisms that regulates the passage of substances like the ions and small molecules through the cell membrane or the plasma membrane, refers to as membrane transport. The plasma membrane being semipermeable in nature allows certain solutes to pass through while denies the passage for some others. Continue reading
Here are practice questions based on Human and Health and Diseases (Chapter-8, Class XII) from previous year board question papers, CBSE Sample paper, and NCERT Exemplar and some other sources. Continue reading
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The only way to make new cells is by duplicating the existing cells. During the process of cell division, the cell duplicates its content and then divides into two. This process of duplication and division is known as the cell cycle. Before the actual division takes place the cell goes through an inter-phase that consists of G1 (Gap 1), S (Synthesis) and G2 (Gap 2) phases. Continue reading
Here are practice questions for Chapter-7 of Class XII Biology:- Evolution. This practice set comprises question from previous year board question papers, CBSE Sample paper, and NCERT Exemplar, and some other sources.
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Here are practice questions for Chapter-3 of Class-XII Biology:- “Human Reproduction”. These questions are based on previous year board question papers, CBSE Sample paper, and NCERT Exemplar and certain other sources. Continue reading