Explore topic-wise InterviewSolutions in Current Affairs.

1. URL (Uniform Resource Locator) is the address of a document on the Internet. 

2. URL is divided into two types: Absolute URL and Relative URL

Internet Assigned Numbers Authority

Types of Name Servers:

There are three types of Name Servers which control the entire

Domain Name System:

Root Name Server – top level server which contains entire DNS tree, maintained by ICANN. There are 13 servers.

Primary/Master Name Server- contains a zone resource records. These records are updatable by domain name holders such as organizations.

Secondary/Slave Name Server – contains a copy of primary server files. This server has no authority to update, but reduce the workload of master server by sharing the queries.

lk is the country domain name for srilanka

63 characters used in the label of a node

TLD directs the query to name servers associated with that specific domain.

Correct answer is  Gymnosperm

Flowering plant : Sun flower Non-flowering plant : Riccial

Correct answer is (b) Biolog

Shoe Flower, Ferns, Crotons, Roses, Lilies, Cactus, Coconut Trees, Royal Palm, Clitoria, Cycas, Agave, Allamanda, Tomato, Brinjal, Lady’s Finger etc in Terrace garden.

Ginger is often mistaken as a root. In fact it is actually an underground stem from a tropical herb plant Zingiber Officinale.

Correct answer is (a) node

Functions of root:

• The root, Fixes the plant to the soil. 
• Absorbs water and minerals from the soil. 
• Stores food in some plants like carrot and beet root.

Functions of stem: 

The stem,

• Supports the branches, leaves, flowers and fruits. 
• Transports water and minerals from roots to upper aerial plant parts. 
• Transports the prepared food from leaves to other parts. 
• Stores food as in the case of sugarcane.

Correct answer is (b) Freshwater

(a) Sickle Cell Anaemia :- Autosomal Recessive (chr. 11) Symptoms:- Anaemia due to RBC destruction.

(b) Phenylketonuria :- Autosomal Recessive (Chr.12) Symptoms:- Brain fails to develop in infancy, mental retardation.

(c) Cystic Fibrosis :- Autosomal Recessive (Chr.7) Symptoms:- Mucus clogging in lungs, liver and pancreas.

A phenomenon where one gene controls more than one phenotypic characters of an organism.

Eg: In Pisum sativum, a gene that regulates colour of flowers also regulates the colour of seed coat.

It represents a pair of genes of 2 alter-natives of the same character and occupies the same position (locus) on the homologous chromosome.

OR

The various forms of genes are called alleles.

1. A carrot, a glass of water and blue ink.

2. Place a carrot in a glass of water with a few drops of blue ink. Leave the carrot in water for two to three days. Then cut the carrot into half length wise and observe.

3. Blue colour appears in carrot which indicates the upward movement of water in the carrot showing that root conducts water.

1. More than 70%

2. deserts 

3. root 

4. leaves 

5. dicotyledonous

Jasmine plant has weak stem. It cannot stand straight on its own. It must climb on any support to survive. So jasmine plant is called as twiner.

1. False. Plants cannot live without water.

2. True.

3. False. Plants have several parts: Such as the root, the stem, leaves, flowers, fruits and seeds.

4. False. Rivers, ponds, lakes and pools are the example for freshwater habitat. (OR) Mountain is an example for Terrestrial habitat.

5. False. Leaves are modified into spines.

6. True.

Leaves of some plants become wholly or partially modified into sharp pointed structures called thorns or spines

Leaves are green in colour, they have chlorophyll and do photosynthesis.

Correct answer is (a) stem

Correct answer is (b) chlorophyll

1. Root lies below the surface of the soil. 

2. It does not have nodes and intemodes. 

3. It has a root cap at the tip. 

4. Roots are positively geotropic in nature.

1. The green leaves prepare food by the process of photosynthesis. 

2. They help in respiration 

3. They carryout transpiration.

1. A small twig of balsam plant, a glass of water and a few drops of red ink.

2. Place the small twig in the water with red ink.

3. The stem becomes reddish

4. This is because red coloured water is being absorbed by the stem upwards.

(c) Photosynthesis

Correct answer is (a) Root

1. Cactus – desert plant ( where there is less or no rain fall) 

2. Stem – store water 

3. Leaves – modified to spines 

4. Roots – well developed, go deep down into soil to get water.

Photosynthesis : chiorophyll Transpiration : Stomata.

• The deer felt sad because humans had chopped down all the trees and there was no place to live. 
• People had chopped the trees. 
• A forest is the safest place for monkey to live. 
• The dwelling place of an animal, plant or other organism is called habitat.

Field Investigation 

Name of the student : Ramesh 

Date : 28 – 07 – 2018 

Location : Thekkady

1. Root, Stem, Leaves, Flower.

2. Fixation-Absorptiori-Conduction-Transpiration

The two major habitats. 

(a) Aquatic habitat 

(b) Terrestrial habitat

(a) Aquatic habitat classified into two. They are 

1. Fresh water habitat 

2. Marine water habitat

(b) Terrestrial habitat classified into three. 

1. Forest habitat

2. Grassland habitat 

3. Desert habitat.

(B) Ultraviolet radiations

No as GMO may pose some threat to environment or living organisms. 

I will ask her to approach GEAC 

Values – sense of responsibility and awareness.

I support sunil 

Bt -Crops produce protoxin which changes into active from in the intestine of the insects in alkaline pH . It is completely safe for other animals and human beings. 

Values – Empathy and Awareness.

Biopiracy 

Values – Awareness, justice for country.

1. Bones form the framework of our body and thus provide shape to the body. 

2. They protect vital organs thus help in the smooth functioning of body. 

3. The joints between the bones help in movement and locomotion.

4. They provide firm surface for attachment of muscles. 

5. They are reservoirs of calcium and form important site for hemopoiesis.

Muscle contraction and relaxation are active processes as during both the processes energy is utilized by hydrolysis of ATP into ADP and inorganic phosphate by the enzyme ATPase.

Long bones, short bones, flat bones, irregular bones and sesamoid bones.

Properties of muscles observed on electrical excitation: 

1. Single muscle twitch: It is a muscle contraction initiated by a single briefstimulation. It occurs in 3 stages: a latent period of no contraction, a contraction period and a relaxation period. 

2. Summation: If the muscle is stimulated before the end of the twitch, it generates greater tension i.e., summation or addition of effect takes place. Repeated stimuli will produce increasing strength of contraction (stair case phenomenon).

3. Tetanus: If stimulation is very rapid and frequent the muscle does not have time to relax. It remains in a state of contraction called tetanus. 

4. Rcfraètory period: Immediately aller one stimulus, the muscle fibre cannot respond to another stimulus. This resting or refractory period is about 0.02 seconds. 

5. Threshold stimulus: For a muscle fibre to contract, a certain minimum strength or intensity of stimulus is required. This is called threshold stimulus. 

6. All or none principie: A stimulus below threshold will not result in contraction. A threshold stimulus will result in contraction. This contraction leads to maximum force. Higher stimulus will not increase force of contraction i.e. a muscle libre contracts either ftilly or not at all. This is ‘all or none’ principle. All types of muscle and nerve fibres obey this law.

7. Oxygen debt: During strenuous exercise, the oxygen supply of muscle rapidly becomes insufficient to maintain oxidative phosphorylation of respiratory substrate. At this stage, muscles contract anaerobically and accumulate lactic acid produced by anaerobic glycolysis. Lactic acid produces less AlP and is toxic. It causes tiredness, pain and muscle cramps. During recovery, oxygen consumption of the muscle far exceeds than that in the resting state. This extra oxygen consumed during recovery is called oxygen debt of the muscle.

Note: The duration of refractory period varies with the muscle involved. Cardiac muscles have a longer refractory period of about 250 msec whereas skeletal muscles have a short refractory period of about I msec

Cartilage and bone

The supportive structures present inside the body form the endoskeleton and when the supportive structures are present on the outer surface of the body they form exoskeleton.

Far point of the human eye with normal vision is near than infinity and near point is 1.2 m.

For normal vision, the near point is about 25 cm and far point is infinity. Thus, a normal eye can see objects clearly that are between 25 cm and infinity.

(a) Hypermetropia 

(b) Myopia