The Fundamental Unit of Life (Class IX)

This is the correct answer. The process of cellular ingestion by which the plasma membrane folds inward to bring substances into the cell is called endocytosis. Amoeba acquires its food through the process of endocytosis.

This statement is incorrect. Thus, it is the correct answer. Plasma membrane is the outermost covering of an animal cell. Cell wall is the outermost covering of a plant cell.

This is the correct answer as both the statements are correct.

This is the correct answer as both the statements are correct. A nucleus has a double layered covering called nuclear membrane. A nucleus contains chromosomes. These chromosomes are visible as rod-shaped structures, only when the cell is about to divide.

This is the correct answer as this statement is incorrect. Onion peel cell is a eukaryotic cell.

This is the correct answer as the cytoplasm does not have its own genetic material.

This is the correct matching. Robert Brown discovered the nucleus in the cell. Robert Hooke discovered cell in a cork slice with the help of a self-designed microscope. Leuwehoek observed free cells like bacteria for the first time. J. E. Purkinje gave the term protoplasm.

This is the correct answer.

This is the correct answer. The endoplasmic reticulum (ER) is a large network of membrane-bound tubes and sheets. ER serves as a channel for the transport of materials (especially proteins) between various regions of the cytoplasm or between the cytoplasm and the nucleus.

This is the correct answer as both the statements are correct.

This is the correct answer as a is the correct pair. The mitochondria is called the powerhouse of the cell because it is responsible for producing most of the cell's energy or adenosine tri-phosphate (ATP).

This is the correct answer as statements b and c are correct.

This is the correct answer. Mitochondria possess their own DNA and carry out some of their own protein synthesis. Chloroplasts are organelles that are found within the cells of plants and algae. Chloroplasts contain the pigment chlorophyll and are responsible for carrying out photosynthesis and contain their own DNA.

This is the correct answer as the cell theory as presented by Schleiden and Schwann points out that all plants and animals are composed of cells and that cell is the basic unit of life.

This is the correct answer as a spirogyra is a multicellular organism that is also a plant-like protist.