PhD Nest

Phylum Porifera: Classification, Characteristics, Examples

Phylum Porifera: Classification, Characteristics, Examples

Definition of Porifera Porifera are asymmetrical or radially symmetrical multicellular organisms with a cellular grade of organisation lacking well-defined tissues as well as organs; exclusively aquatic; mostly marine, sedentary, solitary or conical animals with a body perforated by pores, canals, as well as cambers through which water flows; with one or more internal cavities lined … Read more

Dissecting Microscope (Stereo Microscope) Definition, Principle, Uses, Parts

Dissecting Microscope Parts (Stereo microscope)

Dissecting Microscope (Stereo Microscope) Dissecting Microscope or Stereoscopic microscopes are another name for these. Dissection microscope is a digital optical microscope having low magnification power (5x-250x) which uses light reflected from the specimen’s surface instead of light reflected from the specimen itself. Its principal function is to dissect specimens as well as observe as well … Read more

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

Eukaryotic Cells: Definition, Parts, Structure, Examples

Eukaryotic Cells: Definition, Parts, Structure, Examples

Definition of Eukaryotic Cells Eukaryotic cells feature a membrane-bound, well-defined nucleus as well as several membrane-bound organelles, making them complicated in structure as well as function. The term “eukaryote” comes from the Greek words “eu” as well as “karyon,” which mean “true” as well as “nucleus,” respectively. When compared to prokaryotes, eukaryotic cells have a … 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