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Given below are two statements: Statement I: RuBisCO is the most abundant enzyme in the world. Statement II: Photorespiration does not occur in C4 plants. In the light of the above statements, choose the most appropriate answer from the options given below:
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Mendel's law of Independent assortment does not hold good for the genes that are located closely on the same chromosome. Reason (R): Closely located genes assort independently. In the light of the above statements, choose the correct answer from the options given below:
The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after the S phase?
Given below are two statements: Statement I: Mitochondria and chloroplasts are both double membrane bound organelles. Statement II: Inner membrane of mitochondria is relatively less permeable, as compared to chloroplast. In the light of the above statements, choose the most appropriate answer from the options given below:
In context of amniocentesis, which of the following statement is incorrect?
Select the correct matching of a hormone, its source and its function:
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and formation of X shaped structures called chiasmata. Reason (R): In oocytes of some vertebrates, diplotene can last for months or years.
Selaginella and Salvinia are considered to represent a significant step towards the evolution of seed habit because:
Identify the contraceptive methods A, B, C, D, and E from the list below (corresponding to standard NCERT diagrams): I. Tubectomy II. Vasectomy III. Implants IV. Condoms V. Copper T VI. Cervical caps
Pills, implants and IUDs are very effective if taken within __________ of coitus.
From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
Read the following statements and choose the correct statement:
I: Male condoms are disposable, female condoms are not. II: Male and female condoms, both, are disposable. III: Condoms are not disposable in general. IV: Condoms cannot be self-inserted. What is true from the above statements?
Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?
State which of the following statements are true: I. Abortions could happen spontaneously too. II. Infertility is the inability to produce viable offspring due to defects in the female partner only. III. Complete lactation could help in contraception. IV. Creating awareness can help create a reproductively healthy society.
Given are the following five statements (I - V) for your consideration: I: In Equisetum, the female gametophyte is retained on the parent sporophyte II: In Ginkgo, the male gametophyte is not independent III: The sporophyte in Marchantia is more developed than that in Polytrichum IV: Sexual reproduction in Volvox is isogamous V: The spores of slime moulds lack cell walls How many of the above statements is/are correct?
The drug RU-486 is taken after sexual intercourse. It blocks implantation, and in this sense it prevents pregnancy:
Emerson’s enhancement effect and red drop have been instrumental in the discovery of?
Which of the following characteristics represent the 'Inheritance of blood groups' in humans?