What are Phylum Mollusca? Definition of Mollusca (Mollusks) Mollusca, commonly known as mollusks, is a large phylum of invertebrate animals characterized by a soft body that is often protected by a hard shell. This diverse group includes species such as snails, slugs, clams, octopuses, and squids. Mollusks are known for their unsegmented bodies, bilateral symmetry, … Read more
Definition of Phylum Nematoda Nematodes (Gr. nema thread+ form) are often referred to by various names, such as threadworm, non-segmented roundworm or pinworm. They are distinct from flatworms and higher segmented anelids. Characteristics of Phylum Nematoda Classification of Phylum Nematoda Nematoda is one of the most diverse phyla. At present, there are approximately 15,000 species. … Read more
Definition of binary fission (What is binary fission?) Binary fission can be described as a kind of sexual reproduction in which one living cell, or organelle expands twice its size, and then splits into two identical cells, which means that each of the daughter cells can be expected to grow to what size as the … Read more
What is Monera? Definition of Monera Monera is a historical biological kingdom encompassing prokaryotes, which are unicellular organisms lacking a distinct nucleus. This kingdom primarily included bacteria and archaea, and its members are characterized by the absence of membrane-bound organelles. Over time, taxonomic classifications have evolved, and the term “Monera” is less commonly used today. … Read more
Definition of Mesophyll Cells The mesophyll cell is a group of highly differentiated cells which make up the mesophyll layer in plant leaves. The mesophyll layer in the leaves of dicotyledonous plant species is made up two types of cells: the spongy, and the palisade. This makes the mesophyll a site of photosynthesis. These are … Read more
The study of embryology, also known as embryos, is a key element of evolution in biology and can identify the commonalities and differences between different species. The embryo of an organism refers to the fertilized egg that it progresses through the stages of development, which are unique to the particular species. In examining how the … Read more
What is Facilitated Diffusion? Facilitated diffusion Definition Facilitated diffusion is a passive transport process in which specific molecules move across a biological membrane with the aid of specialized transmembrane proteins, following their concentration gradient without the direct use of energy. Principle of Facilitated diffusion – How does facilitated diffusion work? The principle of facilitated diffusion … Read more
Definition of Simple diffusion Simple diffusion is one of the types of passive transport that is, as the name implies is the simple movement of solute that happens when the electrochemical potentials of one side of the permeable barrier differ. Principle of Simple diffusion/How does simple diffusion work? In free diffusion across a membrane, solute … Read more
Stratified squamous epithelium Definition Stratified squamous epithelium diagram and Structure Classification of stratified squamous epithelium The stratified squamous epithelium is divided into two classes based on the accumulation of keratin by the cells towards the surface; Keratinized stratified squamous epithelium Non-keratinized stratified squamous epithelium Function of stratified squamous epithelium Stratified squamous epithelium play an important … Read more
Overview of Kingdom Animalia The Kingdom Animalia is a large group of multicellular eukaryotic organisms that are heterotrophic in their nature. They get their food from outside sources. While they cannot create their own food and this is among the most characteristic traits of plant cells, animal cells do not have a cell wall like … Read more
