micropyle वाक्य
उदाहरण वाक्य
मोबाइल
- Nevertheless, most lyginopteridalean ovules retained a lagenostome, despite its function in pollen capture having been replaced by the micropyle.
- In a favorable situation, an opening called the micropyle appears and releases amoebocytes, which differentiate into cells of all the other types.
- They can only access the kernel when the shell has been previously damaged by another insect or when a nut has an open micropyle.
- In non-flowering seed plants, pollen germinates in the pollen chamber, located beneath the micropyle, underneath the integuments of the ovule.
- When placed on the ovary, and makes its way along the placenta, guided by projections or hairs, to the micropyle of an ovule.
- The integuments do not enclose the nucellus completely but retain an opening at the apex referred to as the "'micropyle " '.
- The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the micropyle opening in the ovule.
- For the process of pollination to be successful, a pollen grain produced by the micropyle and fertilise it, resulting in the production of a seed.
- The upper or chalazal pole becomes the main area of growth of the embryo, while the lower or micropylar pole produces the stalk-like suspensor that attaches to the micropyle.
- Each egg contains a number of micropyles, or tiny funnel-shaped openings at one end, the purpose of which is to allow sperm to enter and fertilize the egg.
- He describes the standard arrangement in angiosperms the nucellus joined by the chalaza to the integuments, which surround the nucellus except at the micropyle, through which the pollen tubes enter.
- When a pollen grain adheres to the stigma of a carpel it germinates, developing a pollen tube that grows through the tissues of the style, entering the ovule through the micropyle.
- "Drosophila melanogaster " spermatozoa contains an alpha-l-fucosidase that might be involved in fertilisation by interacting with alpha-l-fucose residues on the micropyle of the eggshell.
- Each egg contains a number of tiny funnel-shaped openings at one end, called " micropyles "; the purpose of these holes is to allow sperm to enter and fertilize the egg.
- In gymnosperms ( e . g ., conifers ), the pollen is drawn into the ovule on a drop of fluid that exudes out of the micropyle, the so-called pollination drop mechanism.
- "Palaeoaldrovanda " is not a seed with a basic micropyle or chalaza . [ . . . ] Our new interpretation of " Palaeoaldrovanda " significantly influences the current view of the family Droseraceae.
- Other seed appendages include the raphe ( a ridge ), wings, "'caruncles "'( a soft spongy outgrowth from the outer integument in the vicinity of the micropyle ), spines, or tubercles.
- The cell closest to the micropyle opening of the integuments differentiates into the egg cell, with two "'synergid cells "'by its side that are involved in the production of signals that guide the pollen tube.
- In the field of entomology, he conducted investigations into the micropyle and fertilization of insect eggs, the reproduction and development involving members of Pupipara, parthenogenesis among insects, and studies on the anatomy and life history of the honeybee.
- In later, Pennsylvanian-age ovules such as " Lagenostoma " the nucellus became almost entirely encased by and fused to the integument, leaving just the small distal opening in the integument known as the micropyle through which pollen passed.
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