Ssc Biology Chapter 2 Hand Note - Exclusive

Often called the "brain" of the cell; it contains chromatin which condenses into chromosomes during division. Cell Wall:

Long, cylindrical, unbranched fibers with distinct dark and light bands (striations). They are multinucleated and controlled consciously by the nervous system (e.g., limb muscles).

Animal tissues are highly specialized and categorized into four primary types based on structure, location, and function. Epithilial Tissue

These cells possess a highly organized, membrane-bound nucleus housing the genetic material. They contain specialized membrane-bound organelles. Examples include plant and animal cells. 2. Functional Classification: Somatic vs. Germ Cells ssc biology chapter 2 hand note exclusive

Squamous (filtration/diffusion), Cuboidal (secretion/absorption), and Columnar (protection/secretion). Connective Tissue

Striated, multinucleated, under conscious control. Attached to bones.

Which plant tissue contains aerenchyma? → Often called the "brain" of the cell; it

Loosely coiled thread-like structures containing DNA (Deoxyribonucleic Acid). During cell division, they condense into distinct structures called chromosomes, which carry hereditary traits. 3. Plant Tissues: Simple and Complex

A tissue is a group of cells sharing a common origin, structure, and function. Plant tissues are broadly categorized into Meristematic (dividing) and Permanent (non-dividing) tissues. Permanent tissues are subdivided into simple and complex forms. A. Simple Tissues

Elongated, living cells arranged vertically. Mature sieve tubes lack a nucleus . Their end walls are perforated like a sieve (sieve plates). Animal tissues are highly specialized and categorized into

Cell Membrane (Plasma Membrane)

These cells build the body structure of the organism. They divide via mitosis to facilitate growth, repair, and development. They contain a diploid ( ) number of chromosomes.

Colorless plastids found in roots and underground stems. Their primary function is food storage. 3. Universal and Essential Organelles