Tag: biology

Questions Related to biology

Addiction to alcohol drinking leads to ........... diseases.

innate and learned behaviour option a: neurobiology and behaviour biology

  1. renal

  2. heart

  3. liver

  4. all of these

Show answer
Correct Option: D
Explanation:

Addition to alcohol drinking leads to twelve kinds of diseases. Renal, heart, liver is also one of them. Because alcohol intoxication in our bloodstream and as a result the concentration of alcohol is higher in blood and intoxication 

which is injurious to our health.

More than 25% of drugs are derived from plants. What kind of benefit does this describe?

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Ethical value

  2. Aesthetic value

  3. Direct economic value

  4. Indirect economic value

Show answer
Correct Option: C
Explanation:

Human derives countless direct economic benefits from nature that come under narrow utilitarian category.  These benefits include food, fibre construction material etc.

Which one of the following is the correct statement regarding the particular psychotropic drug specified?

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Morphine leads to delusions and disturbed emotions.

  2. Barbiturates cause relaxation and temporary euphoria.

  3. Hashish causes after thought perceptions and hallucinations.

  4. Opium stimulates nervous system and causes hallucinations.

Show answer
Correct Option: C
Explanation:

Hasish is commonly called as Charas is an hallucinogen that can affect a persons thought , perception and feelings and causes after thought perception.

Select the correctly matched pair from the following 

innate and learned behaviour option a: neurobiology and behaviour biology

  1. LSD-Narcotic

  2. Heroin-Psychotropic

  3. Benzodiazepam-Pain killer

  4. Amphtamine-Stimulant

Show answer
Correct Option: D
Explanation:
 Lysergic acid diethylamide (LSD) is a hallucinogenic drug.
 Heroin is a narcotic drug. 
Benzodiazepines are sedatives.
Amphetamine is a stimulant drug.
So, the correct answer is  'Amphetamine-stimulant'.

The theory of natural selection was given by

biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

  1. Lamarck

  2. Alfred Wallace

  3. Charles Darwin

  4. Oparin and Haldane

Show answer
Correct Option: C
Explanation:
The characteristics that enable enable some organism to survive better than others in the same environment, are said to be selected by nature. Darwin use the phrase 'Natural selection' for this.
So, the correct option is 'Charles Darwin'

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?

biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

  1. Overproduction, variations, constancy of population size, natural selection

  2. Variations, constancy of population size, over-production, natural selection

  3. Overproduction, constancy of population size, variations, natural selection

  4. Variations, natural selection, overproduction, constancy of population size

Show answer
Correct Option: C
Explanation:

Organisms tend to increase the number of offsprings in the individual for survival in number. Then the interspecific, intraspecific, extra specific struggle for existence occurs. Then small changes occur from the parent generation to the next progenies which acts as a raw material for a source of evolution. And nature selects the useful or adaptive variation.

So, the correct answer is 'Overproduction, the constancy of population size, variations, natural selection'.

Fitness according to Darwin refers to______________.

biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

  1. Number of species in a community

  2. Useful variation in population

  3. Strength of an individual

  4. Reproductive fitness of an organism

Show answer
Correct Option: D
Explanation:
According to Darwin's theory fitness refers to the Reproductive fitness of an organism because it describes the reproductive success of an individual which is measured as the number of offsprings produce by an individual with respect to specific genotype or phenotype. Fitness theory of Darwin doesn't depend on strength of an organism to survive but the ability of an organism to pass on its genetic material to its offsprings. 
So, the correct answer is 'Reproductive fitness of an organism'.

The ship used by Charles Darwin during his sea voyages was _____________.

biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

  1. HMS Beagle

  2. HSM Beagle

  3. HMS Eagle

  4. HSM Eagle

Show answer
Correct Option: A

Darwinism explains all the following except.

biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

  1. Offspring with better traits that overcome competition are best suited for the environment

  2. Variations may or may not be inherited from parents to offspring through genes

  3. Within each species, there are variations

  4. Organisms tend to produce more number of offspring than can survive

Show answer
Correct Option: B
Explanation:

The main drawback of Darwinism is lack of knowledge of heredity. Darwin's theory could not explain the inheritance of variations from parents to offsprings through genes.

So, the correct answer is 'Variations may or may not be inherited from parents to offspring through genes'.

Which of the following statements about natural selection are correct?
(i) Tends to increase the characters that enhance survival and reproduction
(ii) Individuals with better adaptive ability leave more progeny
(iii) Was considered as mechanism of evolution by Darwin.

biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

  1. (i), (ii) and (iii)

  2. (i) and (ii) only

  3. (iii) only

  4. (i) and (iii) only

Show answer
Correct Option: A
Explanation:
According to Darwin those organisms who are better fit in their environment produce more number of off springs than others or we can say their reproductive rate is higher than the others. These , therefore , will survive more and hence are selected by nature. And this is the method of evolution according to him.
So, the correct option is '(I), (ii), (iii)'