Tag: zoology

Questions Related to zoology

Hearing is controlled by 

zoology life processes in living organism control of blood glucose parts of the brain kidney

  1. Cerebral hemisphere

  2. Temporal lobes

  3. Cerebellum

  4. Hypothalamus

Show answer
Correct Option: B
Explanation:

The temporal lobe controls hearing. The temporal lobe is located below the lateral fissure on both hemispheres of the brain.

Which part of brain controls emotions like love, anger and pleasure?

zoology life processes in living organism control of blood glucose parts of the brain kidney

  1. Medulla oblongata

  2. Hypothalamus

  3. Cerebrum

  4. Cerebellum

Show answer
Correct Option: B
Explanation:

Emotion involves two parts of the nervous system - the limbic system and the autonomic nervous system. The limbic system is a complex set of structures, that lies on both sides of the thalamus, just under the cerebrum. It includes the hypothalamus, the hippocampus, the amygdala. The hypothalamus feeds information into the amygdala. The hypothalamus acts as a regulator of emotion, controlling levels of sexual desire, pleasure, aggression and anger.

In rabbit, optic lobes are small, because the eye sight is controlled by 

zoology life processes in living organism control of blood glucose parts of the brain kidney

  1. Temporal lobe

  2. Occipital lobe

  3. Frontal lobe

  4. Parietal lobe

Show answer
Correct Option: B
Explanation:

The occipital lobe is the visual processing center of the mammalian brain containing most of the anatomical region of the visual cortex. The occipital lobes are part of the forebrain. A significant functional aspect of the occipital lobe is that it contains the primary visual cortex. The optic lobes are especially prominent in fish and birds.

The part of the brain, which shows progressive increase in size, from a fish to mammals is 

zoology frog control of blood glucose parts of the brain kidney

  1. Cerebrum

  2. Olfactory lobes

  3. Optic lobes

  4. Medulla oblongata

Show answer
Correct Option: A
Explanation:

As we move from fish to mammals, there is an observable increase in the brain size relative to the body size. This progressive increase is mainly observed in the form of an increase in the size of cerebral hemispheres or the cerebellum. So, the correct answer is 'Cerebrum'.

Denitrification is caused by

zoology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Pseudomonas

  2. Nitrobacter

  3. Nitrosomonas

  4. Azotobacter

Show answer
Correct Option: A
Explanation:
Denitrification is the process of degradation of fixed nitrogenous compounds to free nitrogen which is released back to the atmosphere. It is performed by several bacteria like Pseudomonas which utilize nitrate to form nitrite in a process called reduction. Nitrite is further reduced to nitric oxide then to nitrous oxide and then nitrogen gas. This process reduces the fertility and ultimately the agricultural productivity decreases.
Thus, the correct answer is option A.

Choose the correct answer among the alternatives given :


The sexually transmitted disease, that can affect both the male and the female genitals and may damage the eyes of babies born of infected mothers is

zoology infectious diseases cancer and aids hiv and aids immunity related disorders and problems

  1. AIDS

  2. Syphilis

  3. Gonorrhoea

  4. Hepatitis

Show answer
Correct Option: C
Explanation:

Gonorrhea is caused by a Diplococcus bacterium. The victim feels a burning sensation during urination. The incubation period is around 25 days. 


The disease affects the inner membrane of the urinogenital tract and spreads by sexual contact. The infection we spread to other parts of the body and causes arthritis and female sterility. 
The children born to affected mothers often suffer from my eye infection. It is also easily curable.
So, the correct option is 'Gonorrhoea'.

Which one of the following statements is correct with respect to AIDS?

zoology infectious diseases cancer and aids hiv and aids immunity related disorders and problems

  1. Drug addicts are least susceptible to HIV infection

  2. AIDS patients are being fully cured $100\%$ with proper care and nutrition

  3. The causative HIV retrovirus reduces the number of T-helper lymphocytes

  4. HIV can be transmitted through eating food together with an infected person

Show answer
Correct Option: C
Explanation:

 HIV is a retrovirus that primarily infects components of the human immune system such as CD4+ T cells, macrophages and dendritic cell. It, directly and indirectly, destroys CD4+ T cells.

So, the correct option is 'The causative HIV retrovirus reduces the number of T-helper lymphocytes'.

Choose the correct statement/s.
I. A person suffering from AIDS may die from any disease.
II. When a person suffers from AIDS, then his/her immune system becomes stronger.

zoology infectious diseases cancer and aids hiv and aids immunity related disorders and problems

  1. Only I

  2. Only II

  3. Both are correct

  4. Both are incorrect

Show answer
Correct Option: A
Explanation:

Acquired immune deficiency syndrome (AIDS) is a disease caused by HIV in which a person's immunity is badly damaged such that any disease may effect his or her health adversely resulting in appreciable effect on the overall  life expectancy of that person.


Hence, 'Only I' is correct.

Which of the following diseases spreads through infected needles or blood transfusion?

zoology infectious diseases cancer and aids hiv and aids immunity related disorders and problems

  1. Jaundice

  2. AIDS

  3. Measles

  4. Polio

Show answer
Correct Option: B
Explanation:

AIDS (Acquired immunodeficiency syndrome) is an infection which is caused by Human immunodeficiency virus (HIV). The causative agent of the disease is a virus and so the disease can spread from one person to the other by sexual contact. The disease alsoe spreads through the use of teh infected needles, syringes and blood transfusion from the infected person.

Thus, the correct answer is option B. 

The most mutable virus is

zoology infectious diseases cancer and aids hiv and aids immunity related disorders and problems

  1. Chicken Pox Virus

  2. $HIV$

  3. Influenza Virus

  4. Dengue Virus

Show answer
Correct Option: B
Explanation:

Each generation of HIV (from each infected human cell) contains some percentage of variations, or mutations, from the parent virus, and HIV has much more than its proper share of such variations." In fact, it is the most mutable virus known." Until the discovery of this virus, it was commonly said that the influenza virus was the most mutable virus known because each generation changed its coat to some degree. HIV is highly mutable. Because of the virus' ability to rapidly respond to selective pressures imposed by the immune system, the population of the virus in an infected individual typically evolves so that it can evade the two major arms of the adaptive immune system; humoral (antibody mediated) and cellular (mediated by T cells) immunity.

So, the correct answer is 'HIV'.