Biology Questions
Given below are two statements: Assertion (A): Abscission tortoise in Galapagos Islands became extinct within a decade after goats were introduced. Reason (R): Goats were more efficient at browsing than Aldabra tortoise. In the light of the above sta
Colostrum, secreted by mother during initial days of lactation, is abundant in ________.
Given below are two statements: Assertion (A): Forelimbs of human and bats are homologous. Reason (R): Forelimbs of humans and bats have similar anatomical structure. In the light of the above statements, choose the most appropriate answer from the o
For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?
Given below are two statements: Statement I: Plasmids are autonomously replicating DNA. Statement II: Plasmids are extrachromosomal DNA. In the light of the above statements, choose the most appropriate answer from the options given below.
Which of the following enzymes synthesizes precursor mRNA?
Which of the following hormone is not secreted by human placenta?
Given below are two statements: Assertion (A): Abscission tortoise in Galapagos Islands became extinct within a decade after goats were introduced. Reason (R): Goats were more efficient at browsing than Aldabra tortoise In the light of the above stat
Colostrum, secreted by mother during initial days of lactation, is abundant in ________.
Given below are two statements: Assertion (A): Forelimbs of human and bats are homologous. Reason (R): Forelimbs of humans and bats have similar anatomical structure. In the light of the above statements, choose the most appropriate answer from the o
For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?
Given below are two statements: Statement I: Plasmids are autonomously replicating DNA. Statement II: Plasmids are extrachromosomal DNA. In the light of the above statements, choose the most appropriate answer from the options given below.
Which of the following enzymes synthesizes precursor mRNA?
Which of the following hormone is not secreted by human placenta?
Which of the following are secondary lymphoid organs? (a) Bone marrow (b) Tonsils (c) Spleen (d) Thymu Choose the correct answer from the options given below.
Adaptive radiation in placental mammals and Australian marsupials leading to similarity between distant species is an example of ________.
Given below are two statements: Assertion (A): The large growth model of populations is considered more realistic than the exponential growth model. Reason (R): Resources are finite. In the light of the above statements, choose the most appropriate a
The PCR primers bind to the DNA strands in the ________ step.
Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is ________.
Given below are two statements: Statement I: Modern Homo sapiens arose in Australia and moved across continents. Statement II: Homo sapiens arose around 75000 to 10000 years ago. In the light of the above statements, choose the most appropriate answe
Which of the following is not evidence for evolution?
Which of the following is the correct order of arrangement of vertebral column from the head to toe?
Which of the following statements about the absorption process in Henle's loop are correct? (a) The descending limb of Henle's loop is permeable to water but almost impermeable to electrolytes. (b) Urine gets concentrated in Henle's loop. (c) Reabsor
If the diploid chromosome number of a typical angiosperm is 36, what would be the chromosome number in its endosperm?
Which of the following plant produces nonalbuminous seeds?
Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the egg?
Which of the following statements about lac operon is correct?
Muscle contraction is initiated by a signal sent by the central nervous system by the release of ________.
How many theca are present in each lobe of a typical dicot angiosperm anther?
Sponges exchange O₂ with O₂ by ________.
The opening between the right atrium and the right ventricle is guarded by ________.
Match List-I with List-II. List-I A. Excess growth hormone B. Luteinizing hormone C. Vasopressin D. Oxytocin List-II I. Reabsorption of water and electrolytes in kidney II. Contraction of uterus during childbirth III. Acromegaly IV. Ovulation Choose
A population of diploid organisms is at Hardy-Weinberg equilibrium. If the frequency of allele A is 0.1, the frequency of AA is ________.
Which of the following are primary consumers in a food chain?
Given below are two statements: Statement I: Ovulation is caused by LH surge leading to rupture of Graafian follicles. Statement II: Graafian follicle remaining after ovulation transforms into corpus luteum and secretes large amount of estrogen. In t
Arrange the following in descending order of number of species in the Amazonian rainforest. (a) Plants (b) Birds (c) Fishes (d) Invertebrates (e) Mammals Choose the correct answer from the options given below.
Which of the following structure is not a part of the male reproductive system?
The method of directly injecting a sperm into ovum is assisted reproductive technology called:
Natural selection can lead to ________. (a) stabilisation (b) genetic drift (c) directional change (d) disruption Choose the correct answer from the options given below.
Sperm motility is due to ________.
Which of the following disease is not sexually transmitted?
Given below are two statements: Statement I: Down's syndrome is caused by the absence of one of the X chromosomes. Statement II: Turner's syndrome is caused by the presence of an additional copy of the chromosomes. In the light of the above statement
Given below are two statements: Statement I: Chromosomes are fully condensed at the end of prophase. Statement II: Nuclear membrane dissolves during prophase. In the light of the above statements, choose the most appropriate answer from the options g
Given below are two statements: Statement I: The class name Reptilia refers to creeping or crawling mode of locomotion. Statement II: All organisms belonging to Reptilia have three chambered heart. In the light of the above statements, choose the mos
Match List-I with List-II. List-I A. Fusion of protoplasms between gametes B. Fusion of two nuclei C. Generation of haploid spores List-II I. Meiosis II. Plasmogamy III. Karyogamy Choose the correct answer from the options given below.
The correct sequence of adult cell cycle phases is ________.
Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?
Which of the following is not a prokaryote?
Genus represents ________.
Which one of the following statements is incorrect?