2021 - Page 3 of 14

Parental Care in Fishes

September 14, 2021March 11, 2023 pcsclasses

Parental Care in Fishes We can define parental care as an association between parents and the offspring through which the chance of survival of young ones gets increased or any behaviour performed by parents that appears likely to improve the survival and reproduction of the young. In the case of fishes, all fishes do not provide parental care, but in many species of fish, parental care is provided to increase the chance of survival and development of their eggs into adults. Estimation of parental care in Fishes: 77 percent of…

Scales in Fishes

September 13, 2021August 12, 2023 pcsclasses

Scales in Fishes The term Scale is derived from the Old French “escale” meaning a shell pod or husk. Fish Scale Fish scales are part of the Fish’s integumentary system, and these are originated from the Mesoderm layer of the dermis. A fish scale can be defined as the rigid plate that grows out of the skin of a fish. In most of the fishes, the skin is covered with these protective scales. These scales also provide effective camouflage through the use of reflection and coloration, as hydrodynamic advantages. The…

Popular Books Published in 2021

September 11, 2021March 3, 2022 pcsclasses

Popular Books Published in 2021 Here we have listed popular books published in 2021 which are important for exam point of view, as in most competitive exams like UPSC prelims PCS and other states PCS, the name of author and books are always asked. List of books published in 2021 with the name of authors: Author Name of Book K.J Alphons Accelerating India: 7 years of Modi Government Released by Vice President M. Venkaiah Naidu Kavitha Rao ‘Lady Doctors: The untold story of India’s First Women in Medicine. Salman Khurshid…

Migration in Fishes

September 8, 2021August 12, 2023 pcsclasses

Migration in Fishes Many fishes migrate on a regular basis, on a time scale ranging from daily to annually or longer. It may be of short distance over a few meters to thousands of kilometers. Reason for Migration in Fishes: Fishes usually migrate to feed, to reproduce, or in some cases, the reason is not known. Most fishes migrate to reproduce, as some live in seawater but reproduce in fresh water and vice-versa. Classification of Migration in Fishes: The types of migratory fishes are as follows: Anadromous Catadromous Oceanodromuos Diadromous…

National Monetization Pipeline (NMP)

September 8, 2021May 13, 2022 pcsclasses

National Monetization Pipeline (NMP) Launched Date: 23 -AUG-2021 Launched by: Nirmala Sitharaman ( Union Minister for Finance and corporate affairs) Central Government has Announced the Asset Monetization plan to raise the fund of Rs 6 Lakh Crore ($81 Billion) through monetizing the Central Government Core Assets, over the next 4 years until FY2025 under the National Monetization Pipeline (NMP) program. National Monetization Pipeline (NMP) Program Launched by Union Minister for Finance and Corporate affairs Smt. Nirmala Sitharaman. It is Launched as Asset monetization Pipeline of Central Ministries and Public Sector…

Scoliodon – Dogfish, Classification and Characteristics

September 6, 2021March 22, 2023 pcsclasses

Scoliodon – Dogfish, Classification, and Characteristics The Scoliodons commonly called dogfishes are the requiem sharks in the family Carcharchinidae. These are found mainly in the Indo-West Pacific oceans from the western coasts of Africa to the south of Japan. Scientific classification of Scoliodon: Systemic Position of Scoliodon Phylum Chordate Subphylum Vertebrata Division Gnathostomata Superclass Pisces Order Squaliformes Family Carcharinidae Genus Scoliodon Species S. sorrakowah Habit and Habitat of Scoliodons: The Scoliodons are widely distributed in India, Pacific West India, and the eastern coast of South America and the Atlantic Oceans.…

Global Manufacturing Risk Index 2021

August 30, 2021May 22, 2022 pcsclasses

Global Manufacturing Risk Index 2021 When Released: 25th August 2021 The index was released by: Cushman & Wakefield plc (CWK). It is a global commercial real estate services firm. Headquarter: Chicago, Illinois (United States) Top three ranks of Global Manufacturing Risk Index 1st Rank: China 2nd Rank: India 3rd Rank: USA (United States of America) Global Manufacturing Risk Index is about the global ranking in the most advantageous/suitable/desirable destination to invest in the manufacturing sector among 47 countries in Europe, the Americas, and the Asia Pacific. Global Manufacturing Risk Index…

The Solar System

August 28, 2021December 28, 2023 pcsclasses

The Solar System The solar system is a family of the Sun along with eight major planets, dwarf planets (Ex. Pluto), satellites, asteroids, Moons, meteors, and comets. All these orbit the sun to form the Solar System. Sun is our motherly and nearest star, which creates energy from nuclear reactions deep within the interior, by its light and heat life is possible on Earth. Origin of Solar System: The solar system formed 4.6 (4.568) billion years ago from the gravitational collapse of a giant interstellar molecular cloud. Bodies close to…

Herdmania- Sea Squirts

August 20, 2021May 7, 2022 pcsclasses

Herdmania- Sea Squirts Systematic position of Herdmania Kingdom- Animalia Phylum- Chordata Sub Phylum – Urochordata, Tunicata Class- Acidiacea Order- Pleurogona Suborder- Stolidobranchia Family – Pyuridae Genus- Herdmania Habit and Habitat: Herdmania is a sedentary filter-feeding tunicate found in marine habitats. The animal often occurs in a gregarious form. These are marine animals, found in all seas at all depths. Herdmania Momus is one of the most commonly encountered species of ascidians. It is sometimes referred as red-throated ascidian. Each animal is found attached to substratum usually separately, at its posteroventral…

14th August- Partition Horror Remembrance Day

August 14, 2021September 12, 2022 pcsclasses

Partition of India/ 14th august Partition horror day

14th August- Partition Horror Remembrance Day In memory of the struggles and sacrifices of our people, 14th August will be observed as Partition Horrors Remembrance Day: PM The Prime Minister, Shri Narendra Modi has said that in memory of the struggles and sacrifices of our people, 14th August will be observed as Partition Horrors Remembrance Day. In a series of tweets, the Prime Minister said; “Partition’s pains can never be forgotten. Millions of our sisters and brothers were displaced and many lost their lives due to mindless hate and violence.…