Tag: biology

Questions Related to biology

Stamens of Jowar$/$ Grass are

morphology of angiosperms introduction to angiosperms morphology of flowering plants plant kingdom biology

  1. Dorsifixed

  2. Versatile

  3. Basifixed

  4. Adnate

Show answer
Correct Option: B
Explanation:

Stamens of Jowar/Grass are versatile. It implies that their filaments are attached to anther at a point on the connective. Due to this, the anthers can swing freely. This type of arrangement is useful because grasses use wind as the pollinating agent. Freely swinging anthers can dehisce and release the pollen grains in the wind, they can be carried to the suitable stigma.

Hence, the correct answer is 'Versatile'

Anthrax can be prevented and controlled only by destroying contaminated fodder by burning ____________.

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. True

  2. False

  3. Data insufficient

  4. Never

Show answer
Correct Option: B
Explanation:

Explanation: Anthrax can be prevented and controlled by destroying contaminated fodder by burning. But not completely. Anthrax spore vaccine @ 1 ml subcut every year before onset of monsoon in areas where anthrax outbreaks are common.

Name the bacteria that cause anthrax disease in animals.

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. Proteus morganii

  2. Borrelia bacteria

  3. Bacillus anthracis

  4. Trichinella spiralis

Show answer
Correct Option: C
Explanation:
Anthrax is an infection that is caused by the bacteria Bacillus anthracis. These bacteria form spores that are hard-shelled, dormant versions of the bacteria. Spores are the form of the bacteria that cause infection. They can survive in the soil for many decades. Anthrax most commonly occurs in animals such as pigs, cattle, horses, and goats, but it can also infect people.
So the correct option is  'Bacillus anthrcis'

Example of bioweapon ___________.

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. Anthrax

  2. Cholera

  3. Plague

  4. Ebola

  5. All of the above

Show answer
Correct Option: E
Explanation:

Example of Bioweapon_


(1) Anthrax:-  It is caused by a spore-forming bacterium. It mainly affects animals. Humans can become infected through contact with an infected animal or by inhaling spores.

(2) Cholera:- A bacteria disease causing severe diarrhea and dehydration usually spread in water.

(3) Plague:-  The bubonic plague is caused by the disease yersinia pestis. It can spread through contact with infected fleas.

(4) Ebola:-   A virus that causes severe bleeding, organ failure and can lead to death. The human may spread the virus to other humans through contact with bodily fluids such as blood.

Anthrax is transmitted through ____________________.

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. It usually spreads through ingestion of contaminated feed and water.

  2. Occurs by inhalation and biling flies

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C

Which of the following are the diseases caused by bacteria?

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. Cancer

  2. Anthrax

  3. Hepatitis

  4. None of the above

Show answer
Correct Option: B
Explanation:

Anthrax is an infectious disease caused by a bacterium called Bacillus anthracis, which can change into spores that can last for a long time in the environment before germinating. Various other diseases caused by bacteria are relapsing fever, bovine tuberculosis etc. 

Which famous biologist attenuated. the germs of anthrax disease by heating them and inoculated sheep with them, thus making the sheep resistant to anthrax? 

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. Lazaro Spailanzani

  2. Louis Pasteur

  3. Joseph Lister

  4. Francesco Redi

Show answer
Correct Option: B
Explanation:

Pasteur discovered that growing anthrax bacilli at about 42 °C made them unable to produce spores.  . His laboratory notebooks, now  show that he actually used heat and potassium dichromate similar to Toussaint's method, followed by inoculation of the tested animals with the weakened innoculum. The experiment, conducted  by him at Pouilly-le-Fort on sheep, goats and cows, was successful.

So, the correct answer is B. (Louis pasteur )

Choose the incorrect statement w.r.t Bioweapons 

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. they are low cost weapons

  2. they cause more casualities than conventional weapons

  3. they are extremely difficult to detect

  4. Bacterium vibrio cholera created letter scare in 2001

Show answer
Correct Option: A

Symptoms of Anthrax are __________________.

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. Sudden rise in body temperature (104 - 10SF) & Loss of appetite i.e. off-feed

  2. Severe depression or dullness & Suspended rumination

  3. Increased respiration and heart rate & Bloat or tympany

  4. All of the above

Show answer
Correct Option: D
Explanation:

Explanation: Symptoms of Anthrax include all of the above apart from Bleeding from natural openings like anus, nostrils, vulva etc. Sudden death in peracute cases. Dyspnoea - difficult breathing & Dysentery or diarrhoea.

The Anthrax disease is caused by

animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

  1. Virus

  2. Bacteria

  3. Protozoa

  4. Helminthes

Show answer
Correct Option: B