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Why do female pine cones remain on tree after pollination?
Unlike other gymnosperms, in which pollination, fertilization, and seed maturation occur within the same year, the pines have an extended reproductive cycle of 14-20 months. (The period elapsed between the appearance of the ovulate cone and the maturation of pine seeds in those cones. Fertilization takes place about 1 year after pollination, and seed maturation takes several additional months). Some seeds are shed as soon as they mature, whereas others remain within the female cones for weeks, months, or even years before being shed.
Pine pollen is primarily disseminated by?
Pine pollen is primarily disseminated by wind. The lightweight nature of pine pollen allows it to be easily carried by the wind over long distances to reach female pine cones for fertilization.
Are pine trees sexual?
Yes, pine trees are considered to be sexual organisms because they reproduce sexually through the production of male and female cones that contain sperm and eggs for fertilization. This sexual reproduction allows for genetic variation and diversity among pine tree populations.
Pine tree is able to reproduce sexually in dry environment?
Yes, pine trees are able to reproduce sexually in dry environments through the dispersal of their pollen by wind. This method of reproduction is well-suited for dry conditions as it does not rely on water for pollination.
What is the probable function of the wings of a pine pollen grain?
The wings of a pine pollen grain help with dispersal by catching wind currents and enabling the pollen to travel further distances. This increases the chances of successful pollination by reaching other pine trees for fertilization.
The time between the act of pollination and actual fertilization in the pine is about .?
One year
How locations of female and male cones in the pinus can ensure the success of pollination?
The male gametophyte of pine develops in cluster at the tip of lower branches of the cones tree. The location of staminate cones ensures the success of pollination by cross fertilization.
Why do female pine cones remain on tree after pollination?
Unlike other gymnosperms, in which pollination, fertilization, and seed maturation occur within the same year, the pines have an extended reproductive cycle of 14-20 months. (The period elapsed between the appearance of the ovulate cone and the maturation of pine seeds in those cones. Fertilization takes place about 1 year after pollination, and seed maturation takes several additional months). Some seeds are shed as soon as they mature, whereas others remain within the female cones for weeks, months, or even years before being shed.
Do gymnosperms form zygotes?
No, they use external fertilization by "shooting" out their spores when they fall to the ground. The spores will overtime be buried in the ground and then a new pine tree will grow with enough resources.
How the locations of male and female cones in Pinus can ensure the success of pollination?
In Pinus, male cones are typically located closer to the top of the tree while female cones are situated lower down. This spatial separation helps to prevent self-pollination and ensures that pollen carried by the wind is more likely to reach female cones of a different tree, increasing genetic diversity and the success of pollination.
What has the author Robert Peter Brockley written?
Robert Peter Brockley has written: 'Lodgepole pine nutrition and fertilization' -- subject- s -: Pin de Murray, Lodgepole pine, Nutrition, Growth, Croissance, Engrais et amendements, Fertilizers 'Response of thinned, immature lodgepole pine to nitrogen fertilization'
What makes a male comes?
Male cones are reproductive structures found in gymnosperms, such as pine trees. They produce pollen grains containing male gametes that are carried by wind to female cones for fertilization. The male cones typically release their pollen in large quantities to increase the chances of successful pollination.
Are the needles pine trees its actually its leaves?
Yes - the 'needles' of pine trees are their actual leaves.
Pine pollen is primarily disseminated by?
Pine pollen is primarily disseminated by wind. The lightweight nature of pine pollen allows it to be easily carried by the wind over long distances to reach female pine cones for fertilization.
Describe two kinds of plant parts that can make seeds?
two plant parts that make seeds are pine cones and flowers
What has the author L J Heidmann written?
L. J Heidmann has written: 'Heavy fertilization increases diameter growth slightly in a 55-year-old ponderosa pine stand in central Arizona' -- subject(s): Fertilization of plants, Forests and forestry, Ponderosa pine, Measurement
What is the difference between pine and pine trees?
a maple tree is vascular and a pine tree is nonvasclar
