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Parasitology 2020 1.a) What is parasitoid? Ans→ A parasitoid is an organism that lives on or inside another organism (the host) and the host. hold leading to the death of Example: Braconid wasps, Tachinid flies. b) Write the habitat of Wuchereria bancrofti. Ans→ The habitat of Wuchereria bancrofti is within the lymphatic system of the … Read more
Answers of short question from PYQ of Paper Developmental Biology of Semester VI of the years 2020, 2021, 2022 & 2023 respectively. Developmental Biology 2020 1. Answer any ten questions: a) Name two Wnt antagonists which act as head inducer ? Ans→ Chordin and Noggin are the two antagonists that act as a head inducer. … Read more
Mutation: Sudden and abrupt changes to the genetic material of organisms. → Spontaneous change by mutagens that affect on the DNA or the genes or sometimes the complete chromosome. A.) CHROMOSOMAL MUTATION → A parmanent change in the number of chromosome or structure of chromosome of a organisms is called chromosomal mutation. Two types →Variation … Read more
Morphology : 1. Schistosoma haematobium is a parasitic flatworm, belonging to the group of blood flukes. 2. It has a cylindrical body with a distinct oral and ventral sucker. 3. The male and female worms are sexually dimorphic, with the female being larger and longer than the male. 4. The adult worms reside in the … Read more
Late embryonic development is the phase where organs and structures continue to develop and mature in the embryo before birth. Fate of Embryonic layers There are 3 Germ layers – Ectoderm Mesoderm & Endoderm. 1. Ectoderm: 2. Mesoderm 3. Endoderm: Extra embryonic membrane: There are 4 types of Extra embryonic Membrane: – Amnion, Chorion Allantois … Read more
The study of organisms and populations is a fundamental aspect of ecology, focusing on how individual organisms interact with their environment and how populations of species change over time. Important Highlighted Point of NCERT: Organisms and Populations 1) Various levels of biological organisation– macromolecules, cells, tissues, organs, individual organisms, population, communities, ecosystems and biomes. 2) … Read more
Taenia saginata is also known as beef tapeworm and belongs to Class Cestoda of Phylum Platyhelminthes. General Chracters: Morphology: Life cycle of Taenia saginata: Life cycle of T. saginata completes in two hosts. The definitive host is the human where the adult worm resides and produces eggs. And the intermediate host is the cattle where … Read more
Examples of some Parasitic Vertebrates are Cookiecutter shark, Hood Mockingbird, Vampire Bat etc. Some Parasitic Vertebrates : Cookiecutter Shark General description: 1. Cookiecutter shark has an elongated, cigar shaped body with short rounded snout, having length of 42 cm of males and 56 cm of females. 2. The mouth is short, surrounded by suctorial lips. … Read more
Definition: Spindle shaped fibre like cells having ability to contract in order to produce movement of body parts is called muscle tissue. Structure: Function : Types of Muscle Tissue: 3 types of muscle tissue are there : (I) Striated or Skeletal or Voluntary Muscle : Definition: Long cylindrical, multinucleate cells generally attached with skeleton and … Read more
Cranial Nerves: Cranial nerves are pair of nerves that are arise from brain and have a sensory or motor function to different parts of head, neck and trunk. There are 12 pairs of Cranial Nerves. Each nerve are numbered according to Roman numeral between I to XII based on the location for from front to … Read more
Fish diseases can be caused by bacteria, viruses, and protozoa. Bacterial diseases include fin rot; viral diseases cause high mortality; protozoan infections, such as Ich, lead to white spots and respiratory issues. Proper management is essential to prevent outbreaks. Some of the Fish Diseases Bacterial Diseases in Fish : Columnaris : • Causative agent: Flexibacter … Read more
Fish scales are small, rigid plates that grow out of the skin of fish. They serve multiple functions such as protection against predators, parasites, and physical damage, and they also help in reducing water resistance when the fish swims. Types of Scales Mainly scales are of 4 types: (i) Placoid scale (ii) Cycloid scale (iii) … Read more