Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Both reptiles and birds share a number of anatomical features which led biologists to believe that birds descended from reptiles. What are those features?

  1. Presence of an egg tooth in the young at the time of hatching

  2. Lower Jaw made up of five parts

  3. Presence of only one occipital condyle

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

Since crocodiles plummet from a typical precursor with dinosaurs, they can give a helpful developmental correlation with feathered creatures. (In spite of their appearance, flying creatures are more firmly identified with crocs than reptiles are.). Fossilized skulls of child dinosaurs demonstrate a similar example they take after grown-up winged animals.

So, the correct option is 'All the above'.

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Which of the following is not true?

  1. Small sized reptiles of dinosaurs of that era still exist today

  2. Tyrannosaurs rex was about 20 feet in height and had huge some dagger like teeth.

  3. Dinosaur extinct, a possible reason may be most of them has evolved into birds

  4. Giant ferns fell to form coal deposits very fast
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coal deposits were formed over millions of years from ancient plant matter, not very fast. The other statements are generally accepted scientific or historical claims regarding dinosaurs.

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Conditioning behaviour that uses neutral stimulus is called as

  1. Classical conditioning

  2. Operant conditioning

  3. Neutral conditioning

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

Classical conditioning refers to a learning procedure in which a biologically potent stimulus (e.g. food) is paired with a previously neutral stimulus (e.g. a bell).

  •  It's important to note that classical conditioning involves placing a neutral signal before a naturally occurring reflex. In Pavlov's classic experiment with dogs, the neutral signal was the sound of a tone and the naturally occurring reflex was salivating in response to food. By associating the neutral stimulus with the environmental stimulus (presenting of food), the sound of the tone alone could produce the salivation response. 
  • Hence, classical conditioning is the correct answer.

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Animal behaviour is based on

  1. Motivation

  2. Biological activities

  3. Chemical reactions

  4. Biochemical reactions
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The type of animal behavior depends on the stimulus provided and the response generated by the stimulus. When the stimulus is generated, the stimulus is analyzed by the brain or the spinal cord. There are various biochemical reactions which take place in response to the stimulus which is received. The type of response by the animal as a part of the behavior is based on these biochemical reactions. 

Thus, the correct answer is option D. 

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Instinct behaviour is 

  1. Autonomic response

  2. Conditioning response

  3. Voluntary response

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

Instinct behaviour is the autonomic response to the stimuli (external) or environmental conditions. It develops when a human rationalises several voluntary and involuntary actions according to his/her will. It is the behaviour intrinsic to the person. So, the correct option is 'Autonomic response'. 

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

A behaviour that can modify by reinforcement and punishment is called as

  1. Classical conditioning

  2. Operant conditioning

  3. Imitation

  4. Instinct
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Operant conditioning is a method of learning that occurs through rewards and punishments for behavior. Through operant conditioning, an association is made between a behavior and a consequence for that behavior.

For example, when a lab rat presses a blue button, he receives a food pellet as a reward, but when he presses the red button he receives a mild electric shock. As a result, he learns to press the blue button but avoid the red button.

Hence operant conditioning is the right answer.

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

The production of sounds by some insects by rubbing together parts of the body, usually to attract a female, is known as

  1. Undulation

  2. Stridulation

  3. Cacophony

  4. Swan Song
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stridulation is the act of producing sound by rubbing together certain body parts. This behavior is mostly associated with insects, but other animals are known to do this as well, such as a number of species of fish, snakes and spiders. The mechanism is typically that of one structure with a well-defined lip, ridge, or nodules (the "scraper" or plectrum) being moved across a finely-ridged surface (the "file" or stridulitrum—sometimes called the pars stridens) or vice versa, and vibrating as it does so, like the dragging of a phonograph needle across a vinyl record. Sometimes it is the structure bearing the file which resonates to produce the sound, but in other cases it is the structure bearing the scraper, with both variants possible in related groups. Common onomatopoeic words for the sounds produced by stridulation include chirp and chirrup.

So the correct option is 'Stridulation'.

Multiple choice biology digestive system of human assimilation of food and egestion assimilation of food components and importance of food

Which of the following statement is INCORRECT in case of defaecation in the human body?

  1. Defaecation involves both voluntary and involuntary process

  2. Voluntary contractions of abdominal muscles and diaphragm aid in defaecation

  3. Decrease in intra abdominal pressure aids in the process of defaecation

  4. Distention of rectal wall induces defaecation reflex
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Defaecation is the process in which removal of fecal matter outside the body. It involves:-

1)Both voluntary and involuntary process the signal provided can be controlled by the person.
2)Voluntary contractions of abdominal muscles and diaphragm aid in defaecation.
3)Increase in intra abdominal pressure aids in the process of defaecation.
4)Distention of rectal wall induces defaecation reflex.
So the correct option is 'Decrease in intra abdominal pressure aids in the process of defaecation'.

Multiple choice biology digestive system of human assimilation of food and egestion assimilation of food components and importance of food

Which of the following is not constituent of faeces of a healthy individual?

  1. Dead mucosal cells

  2. Cholesterol

  3. Fat

  4. Glucose
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Faces of a healthy person contain a small amount of metabolic waste products like bilirubin and biliverdin that provides colour to it, dead mucosal cells from the lining of the gut, little amount of cholesterol, fat etc.

So the correct option is 'Glucose'.

Multiple choice biology digestive system of human assimilation of food and egestion assimilation of food components and importance of food

Which of the following is known as the building block of proteins?

  1. Amino acids

  2. Enzymes

  3. Fatty acids

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

Amino acids are directly absorbed into blood stream. Blood carries these amino acids to the tissues where they become part of the metabolic pool, from which body proteins are synthesized. Hence, it is known as the building block of proteins.