Explore topic-wise InterviewSolutions in Current Affairs.

Leakage of WBCs from capillaries is called diapedesis.

Two groups are simple and compound.

Pancreas is a heterocrine gland.

A connective tissue that joins bones to bones.

White fibres are formed by collagen and yellow fibres are formed by elastin.

The unit of nervous tissues is neuron.

Tendon : The white fibrous connective tissues forms cords called tendons which connect the skeletal muscles with bones. 

Function of Tendons: This tissue provides strong attachment between various structures. 

Ligament : The yellow elastic connective tissue forms cords called ligament which joins bone to bone. 

Function of Ligament : The tissue allows stretching of various organs as it has considerable strength and elasticity.

(i) Differences between Neuron and Neuroglia:

(ii) Differences between nerve fibre and muscle fibre:

(iii) Differences between myelinated and nonmyelinated nerve fibres:

Fatigue of muscles fibres is caused by the accumulation of lactic acid.

Muscle cells are usually called muscle fibres because the muscle cells are thin and elongated into a thread like structure.

The end to end position of the axon of neuron and the dendrites of another neuron is called the synapse.

OR

Junction gap between two neurons is called synapse.

Short outgrowths from the body of a nerve cell which conducts impulses towards the cell body.

The muscle fibres that join together and contract as separate units are called single unit smooth muscles.

Branched cells of epithelial origin containing muscle protein and specialised for contraction of cells e.g., sweat gland cells.

Neuroglia cells are the cells which holds the neurons together.

Body will have memory B cells of the first encounter/presence of antibodies developed during primary mmune response.

Spleen is the secondary lymphoid organ that stores lymphocytes, it filters blood by trapping blood borne microbes phagocytes and lymphocytes.also acts as a large reservoir to store erythrocytes.   

This is because of presence of antibodies developed during primary.

a. Statement 1 alone is correct.

There were dark clouds hovering around in the sky. They hid the stars with darkness all around. The poet compares the darkness with sadness, as these humid shadows gently weep which pours down rainy tears.

Every raindrop on the tiles of the roof creates a rhythm with the poet’s heartbeat. This evokes thousands of dreams making his thoughts busy. While he focuses on the listening to the pitter-patter on the roof, his mind starts weaving recollections of fond memories of yesteryears.

The poet is appreciating rain, especially when he hears it from a cosy bed in a lovely cottage. This rain and its sound have resurrected the fondest memory of the poet’s mother in his mind. As the rain continues, the poet tries to recollect all that caused him pain, yet at the same time lifted his spirits.

(a) Techoic acid absent

(d) Lipopolysaccharide is present in cell wall 

(c) They contain DNA or RNA 

Svante Arrhenius Swedish physical chemist gave the most modern definition of acids and alkalis.

Some examples of alkalis are sodium hydroxide, potassium hydroxide and calcium hydroxide.

Bases that can dissolve in water are called alkalis.

Zinc hydroxide is a base but not an alkali. It doesn’t dissolve in water.

Do not bring your legs down with a jerk. Patients of high blood pressure and heart problems should not perform this asana.

1. Some acids are prepared artificially from minerals which are extracted from the earth. Such acids are known as mineral acids or synthetic acids. 

2. Hydrochloric acid, sulphuric acid and nitric acids are examples for mineral acids.

Bohr’s Model of an atom, the postulates are

1. Electrons revolve around the nucleus of an atom in a certain definite path called Orbit or stationary state of shell. 

2. The shells are having different energy levels denoted as K, L, M, N 

3. As long as the electron remains in an orbit, they neither absorb nor emit energy. 

4. The electron can move only in that orbit in which angular momentum is quantized, i.e., the angular momentum of the electron is an integral multiple of h/2π

(a) Loona Bimberton.

(b) given in the honour of Mrs. Loona Bimberton.

(c) to celebrate Mrs. Packletide’s achievement. 

(d) because she was not happy with Mrs. Packletide’s popularity.

Tamarind, Lemon, Tomato, Apple, Curd, Raw mango etc.

The word acid came from the Latin word ‘acere’ means sour.

Salt : Salts are formed by neutralization reaction. They are chemically neutral. 

Ex: Common salt.

The circulation of blood between heart and body is called systemic circulation. The left ventricle pumps the oxygenated blood into aorta which gives off arteries to all parts of the body except lungs.

(a) Because Mrs. Packletide had missed her aim and had not killed the tiger.

(b) She is insensitive and an opportunist.

(c) The tiger had probably died of a heart failure. 

(d) Unpleasant

(i) A diet full of extremely oily and greasy products, is known to increase cholesterol level, causing thickening of the arteries which result in high blood pressure. 

(ii) Tobacco smoking also speeds up the heart rate, contracts blood vessels and raises blood pressure. 

(iii) Mental tension is also one of the main cause of hypertension.

The increase in blood pressure is called hypertension.

(a) She is excited at the sight of the tiger moving towards the goat.

(b) These lines show that she tried to take advantage of every situation.

(c) Miss Mebbin is with Mrs. Packletide, ready to kill a tiger.

(d) She is sitting platform constructed in a jungle. 

The study of principals and the framing of the rules for classification is called as taxonomy.

Species: It is the smallest unit of classification it is a group of similar animals which can interbreed to produce fertile offspring. Sometimes, animals of one species develop dissimilarities due to geographical and environmental variations. Now, the species is divided into subspecies. The members of a specific species are/can- 

• Similar in morphology 
• Interbreed to produce fertile offspring
• Originated from same parents.

Ectoderm, mesoderm & endoderm.

Monera, Protista, Plantae, Fungie, Animalia

Acoelomate: The animals without any cavity between ectoderm and endoderm. There are mesenchyma tissues (mesodermal in origin) between ec-toderm & endoderm. 

Example- Platyhelminthese. 

Pseudocoelomate: They have a body cavity between ectoderm and endoderm but it is not lined by the mesoderm. 

Example- Aschelminthese

Binomial nomenclature : 

Caroius Linnaeus (1758) propounded a modem system of nomenclature which is called as binomial nomenclature. It was published in the 10th edition of his book Systema Naturae. According to it- 

• The scientific name of an animal has two parts. The first part denotes genus of the animal & called as generic name. The second part denotes species of the animal and is known as specific name.
• The scientific name is written in Latin i.e. the scientific name be latinized. 
• The scientific name must be written in italics or underlined separately. 
• The generic name begins with capital letter while the first letter of the specific name must be small. 
• The name of discoverer or author if present should appear after the specific name. It should not be italicized. 
• Generic & specific names may be same such as Catla catla & Gorilla gorilla. Common & generic names may be similar, such as Gorilla is the generic name of gorilla. 

Example :

Unicellular, Eunucleus, protozoans

Coelom: The coelom is a body cavity which develops during embry onic development of an animal between ectoderm & endoderm, and it may or may not be lined by mesoderm or it may be absent in some animals. The presence absence & type of coelom is also a basic feature used in animal classification 

• Acoelomate
• Pseudocoelomate
• Eucoelomate

International code of nomenclature : 

In 1898, international congress established a commission to frame international code of Botanical and Zoological nomenclature. This commission suggested some rules in 1901 which were modified in 1964. 

• The zoological name (scientific name) should be Latinized 
• Every animal is to be given a zoological name according to binomial system/trinomial system. 
• The first letter of genus name should always be capital.
• The first letter of species name should always be small. 
• The scientific name should be printed in Italics or underlined separately. 
• The name of subspecies, if any, always comes after the species name.
• If many scientific names have been given to the same animal by different authors, the name used prior to those included by Linnaeus in “Systema Naturae,” 10th edition (1758) is considered valid. 
• The name of discoverer if any, appears at the end of the scientific name.
• The two genera should not have same name & similarity two species in a genus. However, species name may figure many times but each time with a separate genus. For example Elephas indicus (Indian elephant) & Bos indicus (cow).
• Suffix idae should be added in the name of genus to create family and suffix inae should be added in the name of genus to create sub-family