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What is the pollen grain that sends tube down pistil and unites with the ovule?
The pollen grain that sends a tube down the pistil and unites with the ovule is called a sperm cell. This process is known as fertilization and it leads to the formation of a seed. The sperm cell from the pollen grain fertilizes the egg cell within the ovule, initiating seed development.
What is the combination of material from a pollen grain with an egg to form a seed?
When pollen grains land on the stigma of a flower, a pollen tube grows to deliver the male gametes to the ovule. The male gametes fuse with the female gametes in the ovule to form a zygote, which develops into a seed after fertilization. The seed contains genetic material from both the pollen grain (male) and the egg (female).
In conifers such as pines sperm contained in pollen grains are primarily transferred to an egg by what?
In conifers, such as pines, sperm contained in pollen grains are primarily transferred to an egg by wind pollination. This process involves the dispersion of pollen from male cones to female cones through the air. Once the pollen reaches the female cone, it fertilizes the egg to form a seed.
How the nucleus form a pollen grain fertilize a female egg cell?
During pollination, the male nucleus in a pollen grain is transferred to the female egg cell within the ovule of a plant. This transfer is facilitated by a pollen tube that grows from the pollen grain to the ovule. Once the pollen tube reaches the egg cell, the male nucleus fuses with the female nucleus to form a zygote, which eventually develops into a new plant embryo.
How close to the egg can the pollen grain get?
when a pollen grain lands on the stigma it creates a pollen tube that goes down to the egg where sperm fuzes with the egg.
