AIPMT-PRELIMS Zoology Human Reproduction Class 12 Questions

How many plants in the list given below have composite fruits that develop from an inflorescence? Walnut, poppy, radish, fig, pineapple, apple, tomato, mulberry.

Both, autogamy and geitonogamy are prevented in

Which one of the following statements is false in respect of viability of mammalian sperm?

Cycas and Adiantum resemble each other in having

Signals for parturition originate from

The figure shows a diagrammatic sectional view of the female reproductive system of humans. Which one set of three parts out of I – VI have been correctly identified?

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

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

In unilocular ovary with a single ovule the placentation is

Vasa efferentia are the ductules leading from

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

Seminal plasma in humans is rich in fructose. It is secreted by the:

Sertoli cells are found in

The part of Fallopian tube closest to the ovary is

In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube?

The second maturation division of the mammalian ovum occurs

Which one of the following statements about morula in humans is correct?

Which one of the following is the correct matching of the events occurring during menstrual cycle?

Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D.

Which one of the following plants is monoecious?

Foetal ejection reflex in human female is induced by:

Which one of the following is considered important in the development of seed habit?

Vegetative propagation in mint occurs by:

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

A change in the amount of yolk and its distribution in the egg will affect:

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?

In human adult females oxytocin:

In which one of the following, male and female gametophytes do not have free-living independent existence?

Which one of the following is hetero-sporous?

Which one of the following is resistant to enzyme action?

What does the filiform apparatus do at the entrance into ovule?

Which one of the following pairs of plant structures has haploid number of chromosomes?

In humans, at the end of the first meiotic division, the male germ cells differentiate into the:

Which one of the following is surrounded by a callose wall?

Which part of ovary in mammals acts as an endocrine gland after ovulation?

Spore dissemination in some liverworts is aided by

Male gametes in angiosperms are formed by the division of

In gymnosperms, the pollen chamber represents

Long filamentous threads protruding at the end of a young cob of maize are:

Conifers differ from grasses in the:

In a moss the sporophyte:

Sertoli cells are regulated by the pituitary hormone known as:

Withdrawal of which of the following hormones is the immediate cause of menstruation?

In which one of the following sets of animals do all the four give birth to young ones?

Grey crescent is the area:

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

If mammalian ovum fails to get fertilized, which one of the following is unlikely?

Why is vivipary an undesirable character for annual crop plants?

Ovulation in the human female normally takes place during the menstrual cycle -

Which of the following hormones is not a secretion product of human placenta -