In a plant species, flower colour yellow is dominant over white and fruit shape round is dominant over elongated. Crossing was performed between two pure lines - one having yellow-flower and round-fruit and another with white-flower and elongated-fruit. About 20 plants survived in F₁ progeny. Plants of F₁ were allowed to self-fertilise and about 960 plants survived in F₂. If the traits follow Mendelian inheritance, the number of plants would have yellow-flower and round-fruit in F₁ and F₂ are respectively

• 20, 960

• 20, 540

• 10, 180

• 10, 60

X-ray is needed for

• Ultrasonography

• CT scanning

• MRI

• NMR

73.

Which of the following statements is wrong?

• Test tube baby grows inside test tube

• Test tube baby grows within mother's womb

• Test tube baby grows within surrogate mother's womb

• Test tube baby grows following uterine fertilisation

The correct sequence of embryonic development is

• Blastula - Morula - Zygote - Gastrula - Embryo

• Zygote - Blastula - Morula - Gastrula - Embryo

• Zygote - Morula - Blastula - Gastrula - Embryo

• Gastrula - Morula - Zygote - Blastula - Embryo

The time interval of appearance of fever in the malarial patients depends on the types of malaria. The research evidences suggest that such time intervals are-(1) 36-48 hours, (2) 48 hours and (3) 72 hours. If any such patient experiences fever at an interval of 48 hours, then the said patient suffers from

• only benign tertian malaria

• quarantan malaria or mild tertian malaria

• malignant tertian malaria or benign tertian malaria

• mild tertian malaria or benign tertian malaria

The structure of E. coli chromosomal DNA is

• double- stranded, right handed and circular

• single- stranded, right handed and circular

• double- stranded, left handed and linea

• double- stranded, left handed and circular

If spermatogenesis proceeds too rapidly, inhibin is released. Inhibin reduces the secretion of

• Luteinising Hormone (LH)

• Follicle Stimulating Hormone (FSH)

• Testosterone

• Interstitial Cell Stimulating Hormone (ICSH)

Genetically improved crop varieties can be developed in laboratory by

• somatic hybridisation

• transgenic technology

• cell suspension culture

• somaclonal variation

Sand flies play significant role in spreading kala-azar because they

• suck blood only from the patients suffering from kala-azar

• convert amastigote into promastigote

• engulf amastigote at the time of blood sucking from the infected persons

• inject promastigote into the body of non-infected persons at the time of blood sucking

Which of the following statement(s) are true?

• Antibiotics can kill bacteria, but disinfectants do not

• Disinfectants have better bactericidal efficiency than antibiotics

• Antibiotics are of microbial origin, but disinfectants are chemical compounds

• Antibiotics can be injected into the patients, whereas disinfectants are not