Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

 Multiple Choice QuestionsMultiple Choice Questions

91.

where will you look for the sporozoites of the malarial parasite?

  • Red blood corpuscles of humans suffering from malaria

  • Spleen of infected humans

  • Salivary glands of freshly moulted female Anopheles mosquito

  • Salivary glands of freshly moulted female Anopheles mosquito


D.

Salivary glands of freshly moulted female Anopheles mosquito

Sporozoite is the infective stage of the malarial parasite. They are present in the saliva of infected female anopheles mosquito.

389 Views

92.

What type of human population is represented by the following age pyramid? 


  • Stable population

  • Declining Population

  • Expanding population

  • Expanding population


B.

Declining Population

An age pyramid is a graphic representation of the proportion of various age groups of a population with pre-reproductive at the reproduction in the middle and posts-reproductive at the top. For human population, the age pyramids show age distribution of males and females in the combined diagram. The shape of the age pyramids reflects the growth status of the population. In a declining population the shape of the pyramid is urn- shaped.

576 Views

93.

peptide synthesis inside a cell takes place in 

  • mitochondria

  • chromoplast

  • ribosomes 

  • ribosomes 


C.

ribosomes 

The cellular factory responsible for synthesising proteins (peptide synthesis) is the ribosome.

335 Views

94.

In which one of the following pollination is autogamous?

  • Xenogamy

  • Chasmogamy

  • Cleistogamy

  • Cleistogamy


C.

Cleistogamy

Bisexual flowers which remain always closed are called the cleistogamous and such condition of flowers is called cleistogamy. In such flowers, the anthers and stigma lie close to each other. When anthers dehisce in the flowers buds, pollen grains come in contact with stigma to effect pollination. Thus, cleistogamous flowers are invariably autogamous.

340 Views

95.

When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both its parents. This phenomenon is called

  • transformation

  • splicing

  • metamorphosis

  • metamorphosis


D.

metamorphosis

The superiority of hybrids over either of the parents (dominant or recessive is called hybrid vigour (G. shull). Heterosis is equivalent of hybrids vigour.

431 Views

96.

An organism used as a biofertilizer for raising soybean crop is 

  • Azospirillum

  • Rhizobium

  • Nostoc

  • Nostoc


B.

Rhizobium

Rhizobium leguminosarum is a symbiotic bacteria found in root nodules of legume. This bacterium has nitrogen fix nif gene and fixing N2, Soybean is a legume. Thus, Rhizobium is used as a biofertilizer for raising soybean crop.

504 Views

97.

Archegoniophore is present in 

  • Chara

  • Adiantum 

  • Funaria

  • Funaria


D.

Funaria

In Marchantia, a bryophyte, the archegonia (female sex organs) are borne on special branches called archegoniophore or female receptacles. Each archegoniophore has rows of archegonia protected by involucre or perichaetium.

547 Views

98.

Nucellar polyembryony is reported in species of

  • Gossypium

  • Triticum

  • Brassica

  • Brassica


D.

Brassica

The occurrence of more than one embryo in a seed is referred as polyembryony. In many Citrus and mango varieties, some of the nucellar cells surrounding the embryo sac and develop into the embryos in such species each ovule contain many embryos (nucellar polyembryony).

794 Views

99.

he figures given below depicts a diagrammatic sectional view of the female reproductive system of humans. Which one set of three parts out of A-F have been correctly identified.


  • C- Infundibulum, D -Fimbriae, E -cervix

  • D- oviducal funnel, E Uterus, F- cervix

  • A - Perimetrium, B - Myometrium, C -Fallopian tube

  • A - Perimetrium, B - Myometrium, C -Fallopian tube


A.

C- Infundibulum, D -Fimbriae, E -cervix

The fallopian tube is about 10-12 cm long and extends from the periphery of each ovary to the uterus. The part closer to the ovary is the funnel-shaped and is called infundibulum. The edges of the infundibulum possess finger - like projections called fimbriae, which helps is a collection of the ovum after ovulation. The uterus opens into the vagina through a narrow cervix.

337 Views

100.

The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for

  • escaping any possible compression by the visceral organs

  • providing more space for the growth of epididymis

  • Providing a secondary sexual feature for exhibiting the male sex

  • Providing a secondary sexual feature for exhibiting the male sex


D.

Providing a secondary sexual feature for exhibiting the male sex

The testes in humans are situated outside the abdominal cavity in scrotal sacs. This is because the temperature of scrotal sacs is 25o C less than internal body temperature.

326 Views