Taxonomy- is the science of naming, describing and classifying organisms and
includes all plants, animals and microorganisms of the world. Using
morphological, behavioural, genetic and biochemical observations, taxonomists
identify, describe and arrange s
protect underlying tissues from injury
prevent excessive loss or absorption of water and the consequent effect on tissues
aid excretion and absorption of specific metabolites and ions
almost all sense o
Cells need to interact with their environment and other cells around them.
This is called Cell Signalling. Single cellular organisms need to detect
nutrients in their environment, and cells in multicellular organisms are
The cell cycle (mitosis)
What is (and is not) mitosis?
Mitosis is nuclear division plus cytokinesis, and produces two identical daughter
cells during prophase, prometaphase, metaphase, anaphase, and telophase.
Interphase is often included in
What is the digestive system?
The digestive system with sections labeled: mouth, esophagus, liver, stomach,
gallbladder, pancreas, small intestine, large intestine, rectum, and anus.
1. The digestive system is made up of the
The immune system notes
The immune system is a system of biological structures and processes within
an organism that protects against disease. To function properly, an immune
system must detect a wide variety of agents, from viruses to parasitic worms,
The nervous system is essentially a biological information highway, and is
responsible for controlling all the biological processes and movement in the
body, and can also receive information and interpret it via electrical signals
which are u
What is DNA?
DNA, or deoxyribonucleic acid, is the hereditary material in humans and
almost all other organisms. Nearly every cell in a persons body has the
same DNA. Most DNA is located in the cell nucleus (where it is called
nuclear DNA), but a small am
Flower Structure and Reproduction
Flowers are the plant's reproductive structures. Angiosperms are types of plants
that bear fruits and flowers. Flowers are usually both male and female, and are
brightly colored to attract insects to help them carry polle
Cell NucleusIn cell biology, the nucleus is a membrane-enclosed organelle found in eukaryotic cells.
Made up of:
cell's genetic material
organized as multiple long linear DNA molecules
large variety of proteins like :histones form into chromosomes.