Length of pollen tube depends on the distance betweenpollen grain and upper surface of stigma.pollen grain on the upper surface of stigma and ovule.pollen grain in an anther and upper surface of stigma.upper surface of stigma and lower part of style.

In conifers, how do pollen grains reach the scales of female cones?Multiple choice question.winda pollen tube grows from the microsporangium to the megasporangiumanimalsa thin film of water is required

Explain the role of the pollen tube

Describe what would happen when pollen grains lands on the stigma.

D. Name the following.1.The top, swollen tip of a pistil.2. The middle part of a pistil.3. The swollen part at the bottom of the pistil.4.The transfer of pollen grains from the anther of a stamen to the stigmaof a pistil.5. The process in which the male gamete present in pollen grain fuses(joins) with the female gamete present in ovule to form a new cellcalled zygote.6.The hard, innermost layer of the fruit that encloses the seed.7. The fleshy part of the seed or seed leaves.Give The answer​

12The researchers are fascinated with the structure and shape of bee stigmas, the feminine organs responsible for harvesting and transmitting pollen. Aware of the bees' pivotal role in plant reproduction, they seek to decode how the distinct traits of bee stigmas enhance their competence in pollination. The hypothesis put forward by the researchers suggests that extended bee stigmas enhance the efficiency of bees in amassing and disseminating pollen. They initiated an extensive investigation comparing diverse bee species boasting different stigma configurations to substantiate their proposition. The researchers meticulously examined the volume of pollen clinging to the stigmas post the bees' visitation to specific plant species.12 Mark For Review12Which finding, if true, would most directly support the researcher’s hypothesis?A) Pollen from a particular flower species was transferred more effectively by local bees compared to other floral types.B) The extended stigmas tend to fracture more effortlessly than the shorter ones due to a heightened moment of inertia.C) Bees possessing stigmas with reduced and more readily accessible structures exhibit a significantly augmented pollen load compared to bees with protracted stigmas.D) Bees with stigmas with elongated, branched, and complexly folded configurations demonstrate a considerably increased pollen haul compared to bees with simpler, abbreviated stigmas.