Tag: evs

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Multiple choice evs from gathering food to growing food - the earliest people tribal societies the earliest people tribes, nomad and settled societies

Ikkat sarees are high quality silk sarees containing simple _______ and available mostly in three colours and shades.

  1. Alphabetical designs

  2. Geometrical designs

  3. Numerical designs

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Geometrical designs,

Single Ikat is a process in which either the warp yarns or the weft are dyed.
The second procedure of combined Ikkat has both warp yarns and the weft being used together in different parts of the fabric.
Double Ikat involves both warp and weft threads tied in a greatly precise manner so that when the threads from both axis mesh with each other at certain points to show up a completed pattern.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

The longest loop of Henle is found in 

  1. Kangaroo rat

  2. Opposum

  3. Rhesus monkey

  4. Porcupine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Kangaroo rat lives in the desert, therefore, it needs to conserve water in the body. In kangaroo rat, the loop of Henle is significantly longer as it descends further into the medulla and produces a higher concentration gradient in the surrounding tissue so as to produce urine which is 18 times concentrated than that of their blood. This gradient allows more water to diffuse into the surrounding tissues to be reabsorbed. 
So the correct answer is 'Kangaroo rat'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

An organism which has Malpighian tubule as excretory organ can be placed in phylum

  1. Arthropda

  2. Annelida

  3. Platyhelminthes

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Malpighian tubules are the excretory organs in all insects. The tubules often occur in two’s or multiples of two. As insects belong to the phylum Arthropoda, the organism must be placed under it. 

So, the correct option is 'Arthropoda'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Name the excretory organs of grasshopper.

  1. Malphigian tubule

  2. Nephridia

  3. Flame cells

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The excretory organs of grasshopper are the malpighian tubules which are coiled about in the haemocoel and open into the anterior end of the hindgut. The malpighian tubules have a wall of a single layer of cells with striated inner border. Their free ends are completely closed. In the majority of Arthropods, Malpighian tubules are the excretory organs. So, the correct option is 'Malpighian tubule'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Organs of excretion in annelids are

  1. Suckers

  2. Nephridia

  3. Lungs

  4. Kidney
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Organs of excretion in annelids are nephridia. The nephridium is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney. Nephridia remove metabolic wastes from an animal's body. 
So, the correct answer is 'Nephridia'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Kidney of adult reptile is 

  1. Metanephric

  2. Mesonephric

  3. Pronephric

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

On the basis of development, there three types of kidneys as pronephric kidney, mesonephric kidney and the metanephric kidney.

A. The metanephric kidney is present in the reptiles, birds, and mammals. In these types, the glomeruli are well developed.
B. The mesonephric kidney is present in adult fishes and amphibians. They have internal glomeruli enclosed in capsules forming Malpighian bodies.
C. The pronephric kidney occurs in jawless fishes and represents the earliest stage.
Hence, the correct answer is 'Metanephric'

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

The most advanced kidneys in which loop of Henle is present are called metanephric kidneys,these are in all;except one

  1. Amphibians

  2. Reptiles

  3. Birds

  4. Mammals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Amphibians have mesonephric type of kidneys which are primitive compared to metanephric kidneys. 
  • Mesonephric kidneys do not have nephrons but their nephrons do not contain a loop of Henle.
So, the correct option is 'Amphibians'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Nephridia are the excretory organ of ___________.

  1. Protozoans

  2. Coelenterates

  3. Flatworms

  4. Annelids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Nephridia: a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls. Nephridia remove metabolic wastes from an animal's body. They are present in many different invertebrate lines. There are two basic types, metanephridia and protonephridia, but there are other types. A metanephridium is a type of excretory gland found in many types of invertebrates such as annelids, arthropods and Mollusca.

So, the correct answer is 'Annelids'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

In which one of the following organisms its excretory organs are correctly stated?

  1. Frog - kidneys, skin and buccal epithelium

  2. Human - kidneys, sebaceous glands and tear glands

  3. Earthworm - pharyngeal, integumentary and septal nephridia

  4. Cockroach - Malpighian tubules and enteric caeca
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nephridia is the earthworm's excretory organ. Earthworms are called septal, integumentary, and pharyngeal nephridia in three kinds of nephridial structures. These three nephridial structures are present in various body positions and differ in structures as well. Septal and pharyngeal nephridia are both enteronephric, i.e. they expel nitrogen products to the gut. Integumentary nephridia is exonephric, i.e. products of nitrogen waste are discharged outside straigh