It holds instructions and data essential to process raw data and produce output. Cells are small parts among which the computer memory is divided. A unique address is assigned to each cell which can be 0 or even -1. There are two types of computer memory: Volatile (RAM) Non-Volatile (ROM) Hard disk, which is a … Read more
A computer has 5 main components. They are given below: Input devices CPU Output devices Primary memory Secondary memory The brief explanation about computer components is provided below: Inputting: It is the process of entering information, instructions and raw data into the computer. Input devices help to complete this process. Storing: Primary memory and secondary … Read more
All the important functions of the computer are carried out by the CPU. It produces the output after receiving instructions from both the hardware and active software. It is also known as microprocessor, processor, and central processor. All the important programs like application software and operating system are stored by the CPU. It also works … Read more
It is smaller in size but faster in speed than the main memory. It can be accessed by the CPU more quickly than the primary memory. The programs and data frequently used by the CPU are held by the cache memory. If the CPU is able to find the required instructions or data in cache … Read more
Epidermis: It is made up of a single layer of cells with an external coating of waxy cuticle. Epidermal outgrowths are usually absent. Very few stomata are found. Hypodermis: It is composed a few layer of sclerenchyma cells lying just below the epidermis. It gives mechanical support to the stem. Ground Tissue: The ground … Read more
Epidermis It is the outermost layer formed of a single layer of cells. It forms the protective layer of the stem. It has a thick waxy layer called cuticle over the external surface. It bears trichomes and a few stomata. Cortex The cortex is heterogeneous and differentiated into several sub- zones. The outer zone … Read more
Epidermis It is the outermost layer composed of a single layer of cells. Unicellular hairs are present. Cuticle and stomata are absent. Cortex: It is similar to dicot root, and is composed of parenchyma cells. Endodermis It is composed of compactly arranged barrel-shaped cells. The lateral walls of the cells have casparian thickenings. … Read more
Epidermis The outermost layer of a dicot root is called epiblema or piliferous layer. It is made of a single layer of parenchyma cells. The cells have tubular outgrowths called root hairs. Cuticle and stomata are absent. Cortex it is the region between epidermis and endodermis. It is homogeneous and is composed of loosely … Read more
Vascular tissue The vascular system is composed of the conductive tissues xylem and phloem. A group of xylem and phloem forms the vascular bundle. In dicots, cambium is present between the xylem and phloem. This allows the vascular bundle to form secondary xylem and phloem tissue. Such a vascular bundle is called an open vascular … Read more
A group of tissues carrying out a common function irrespective of their position is called a tissue system. There are 3 types of tissue systems in plants. Dermal /Epidermal tissue: They are protective tissues. Vascular tissue: Conduction of water, minerals and organic food materials. Ground tissue: All tissue except dermal and vascular tissues. Dermal Tissue … Read more