Tag: zoology

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Questions Related to zoology

Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

Different type of reflex arc is_____________

  1. Somatic Reflex arc

  2. Visceral Reflex arc

  3. Both A and B

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

There are two types of reflex arcs namely, autonomic (visceral) reflex arc, affecting inner organs and somatic reflex arc, affecting muscles. 

Therefore, the correct answer is option C.

Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

Which among the following is the correct definition of taxis?

  1. The movement of a body towards or away from the stimulus is called taxis

  2. The movement of a body away from the stimulus is called taxis

  3. The movement of a body towards the stimulus is called taxis

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

  • The movement of animals towards or away from the stimulus is called as the taxis. The taxis may be negative or positive. 
  • The movement away from a stimulus is called negative taxis and the movement towards the stimulus is called positive taxis.


Therefore, the correct answer is option A.

Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

Monosynaptic reflex is a _____________

  1. Complex reflex arc consisting of two sensory neurons and one motor neuron

  2. Simple reflex arc consisting of two sensory neurons and one motor neuron

  3. Simple reflex arc consisting of one sensory neuron and one motor neuron

  4. Simple reflex arc consisting of one sensory neuron and two motor neurons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • A simple reflex arc consists of only one sensory neuron and one motor neuron, hence the name is the monosynaptic reflex. A complex reflex arc or polysynaptic reflex is formed when the sensory neuron influences several motor neurons through intermediate (association) neurons of the spinal cord. Complex reflex arc consisting of two sensory neurons and one motor neuron.


Therefore, the correct answer is option C.

Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

A sleeping cat suddenly gets up and chases a rat. The movement involved is similar to

  1. the movement of train on green signal

  2. the movement of the football when kicked by the player

  3. the ringing of alarm when the correct time is reached

  4. the movement of eyelids when something falls into the eye.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A sleeping cat suddenly gets up and chases a rat. The movement involved is similar to the movement of train on green signal, because it is involuntary action.

So, the correct option is ‘the movement of train on green signal’.

Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

Which of the following is an incorrect pair?

i. Effector organ of somatic reflex- Skeletal muscles
ii. Receptor organ of somatic reflex- Smooth muscles
iii. Effector organ of visceral reflex- Skin
iv. Receptor organ of visceral reflex- Epithelial lining of the gut

  1. (i) and (iii)

  2. (ii) and (iii)

  3. All of the above

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

The somatic reflex arc affects the muscles and the receptor organ is skin whereas, the effector organ is skeletal muscles. The visceral reflex arc affects the internal organs and the receptor organ is epithelial lining of the gut whereas, the effector organ is smooth muscles. 

Therefore, the correct answer is option B.

Multiple choice zoology garbage in, garbage out plastic waste thermocol ways to reduce non degradable garbage recycling of paper

Polyblend is ___________________.

  1. A mixture of two different types of plastics

  2. A fine powder of recycled modified plastic

  3. A blend of plastic and bitumen

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

Ahmed khan, a plastic sack manufacturer of Bangalore in 1998, developed polyblend, a fine powder of recycled modified plastic in collaboration with R. V. Collage of Engineering and Bangalore city Corporation. He proved that the mixture of polyblend and bitumen was better for road carpeting as it had better water repellent property. It increased road life by a factor of three.

Multiple choice zoology garbage in, garbage out plastic waste thermocol ways to reduce non degradable garbage

The materials like plastics are not acted upon by physical process.

  1. True

  2. False

  3. Either

  4. Neither
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Materials like plastics are non-biodegradable which are not broken down into simpler substances by the action of microbes. Such materials can only be broken down by physical processes under the conditions of high temperature and pressure. The non-biodegradable items persist in nature for a long period of time and hence, for their elimination, they are acted upon physical processes because they are made up of cross linked polymers which can be broken down under extreme physical conditions.
Hence, the statement given in the question is not correct.
So, the correct answer is 'False'.
Multiple choice zoology garbage in, garbage out plastic waste thermocol ways to reduce non degradable garbage recycling of paper

Ecological imbalance in the biosphere is created by 

  1. Cutting of forests

  2. Conservation of forest

  3. Production of more plastics

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Deforestation means the felling and clearing of forest cover or tree plantations in order to accommodate agricultural, industrial or urban use. It involves permanent end of forest cover to make that land available for residential, commercial or industrial purpose. Deforestation can also be seen as removal of forests leading to several imbalances ecologically and environmentally. Synthetic products are materials that are made by chemical processes that are formed artificially by chemical synthesis such as plastic bags, chairs, toys, etc. These synthetic materials can last for years and cannot be decomposed by decomposers. These synthetic products like different plastic products are made up of plastic; this creation of man hinders the flow of materials in the biosphere. Improper disposal is one of the reasons why synthetic products become of the problems and causes of ecological imbalance. It destroys ecosystem that can kill the organism and at the same time it causes various problems in the living world such as pollution.

Therefore, the correct answer is option D.

Multiple choice zoology garbage in, garbage out plastic waste thermocol ways to reduce non degradable garbage recycling of paper

What is the best method to avoid pollution by using plastic bags?

  1. Bury the plastic bags in the soil

  2. Use biodegradable plastic bags

  3. Throw the plastic bags into the river

  4. Burn the plastic bags in a rubbish dump
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The plastics are the non-biodegradable wastes because they are synthetic polymers which cannot be acted upon by the microbes. The plastics should not be dumped in the soil, river or rubbish dump. The biodegradable plastics should be used which will reduce the pollution and the problems created by the use of plastics. 

Thus, the correct answer is option B.