PhD Nest

Epithelial Tissue Vs Connective Tissue: Definition, 16+ Differences, Examples

Epithelial Tissue Vs Connective Tissue: Definition, 16+ Differences, Examples

Definition of Epithelial Tissue Epithelial tissue is a kind of animal tissue which is composed of highly aggregated polyhedral cells which are tightly attached to each other as cellular sheets which line the inside of hollow organs and cover the body surface. Cells in epithelial tissue or epithelium (plural: epithelium) are organized in continuous sheets, in … Read more

Enzymes Vs Coenzymes: Definition, Differences, Examples

Enzymes Vs Coenzymes: Definition, Differences, Examples

Definition of Enzymes Enzymes are biological molecules that operate as biological catalysts in living systems, speeding up the rate of chemical reactions. Enzymes are proteins that act on compounds known as substrates to create other molecules known as products. Enzymes are required for the majority of metabolic processes in biological systems to occur at rates … Read more

Asexual Vs Sexual Reproduction: Overview, 18+ Differences, Examples

Asexual Vs Sexual Reproduction: Overview, 18+ Differences, Examples

What is Asexual Reproduction? Asexual reproduction is a type of reproduction which takes place without the fusing of gametes and without the switch over of genetic information, resulting in offspring that are genetically identical to their parents. Asexual reproduction in living creatures is distinguished by the lack of male as well as female gametes, and … Read more

25+ Differences between Invertebrates and Vertebrates

Differences between Invertebrates and Vertebrates

Differences between Invertebrates and Vertebrates Invertebrates (non-chordates) and vertebrates (living things)  (Chordates) make up the majority of the animal kingdom. Those without a vertebral column or backbone are called invertebrates, while those with one are called vertebrates. Characteristics Invertebrates (Non-Chordates) Vertebrates (Chordates) Radial Bi-radial, or not present Bilateral Symmetry Metamerism True or pseudo metamerism or not present True … Read more

20+ Differences between Active Immunity and Passive Immunity

20+ Differences between Active Immunity and Passive Immunity

What is Active Immunity ? Active immunity is the straight response of the body towards pathogens. These pathogens are infectious microorganisms. They are also foreign substances that develop following an infection or vaccination. What is Passive Immunity ? Passive immunity is the transfer of active humoral immunity of ready-made antibodies. It is provided when someone … Read more