Embryo sac is formed inside
Embryo sac: A large cell that develops in the ovule of flowering plants. It is equivalent to the female gametophyte of lower plants, although it is very much reduced. Typically, it contains eight nuclei formed by division of the megaspore mother cell.
Period of pregnancy is called
Pregnancy, also known as gravidity or gestation. Pregnancy Period is classified into three Trimester.They are As follows-:
► First Trimester (0 to 13 Weeks).
► Second Trimester (14 to 26 Weeks) is often called the "golden period" because many of the unpleasant effects of early pregnancy disappear.
► Third Trimester (27 to 40 Weeks).
Menstrual cycle is completed in
The average length of the menstrual cycle is 28–29 days, but this can vary between women and from one cycle to the next. The length of your menstrual cycle is calculated from the first day of your period to the day before your next period starts
Cleistogamous flowers are
Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. Especially well known in peanuts, peas, and pansy this behavior is most widespread in the grass family. However, the largest genus of cleistogamous plants is Viola.
Which of the following is a hermaphrodite?
In males, urethra carries
The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of ejaculating semen when the man reaches orgasm. When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.
Therefore, Option D is the correct answer.
When seeds are attached to the parent plant, the type of germination is known as
Usually plants multiply by dispersion of seed through agencies like air, water, bird droppings or seed simply falls on ground near the parent plant and gives rise to a new plant. But in certain conditions seed cannot germinate if it falls down, like in the case of marshy areas or sea coast. Mangrove plants show vivipary i.e. seeds germinate while they are still attached to the parent plant. The seedling then, falls into water (due to increase in its weight) and develops roots. E.g. Rhizophora, Sonneratia etc.
External fertilisation occurs in the majority of
So, the correct option is 'algae'.
Man is unisexual. Unisexuality, in biology, is the condition of an organism or species capable of producing only male or female gametes (sex cells) but never both. A unisexual organism of a bisexual species is one in which the male and female gonads are found in separate individuals. In plants this condition is often called dioecism.
The product of sexual reproduction generally generates
Sexual reproduction leads to new genetic combination leading to variation in new products. The longer viability of seeds, prolonged dormancy and large biomass are not related to sexual reproduction.