Asked By: Jose Alexander Date: created: Jul 11 2022
What is pollinium give an example
Answered By: Gregory Hill Date: created: Jul 11 2022
In plants like orchids and many species of milkweed (Asclepiadoideae), a pollinium (plural pollinia) is a coherent mass of pollen grains that are the product of just one anther but are transferred during pollination as a single unit.
Asked By: Jose Torres Date: created: Jul 17 2021
What is pollinium give 12 examples
Answered By: Lucas Morris Date: created: Jul 20 2021
Solution: Some plants, such as Calotropis, have a structure called a pollinium, which keeps all the microspores in a microsporangium bound together. Step-by-step video solution for [object Object] by Biology experts to help you with doubts & scoring excellent marks in Class 12 exams.
Asked By: Alexander Washington Date: created: Aug 07 2022
What is pollinium 12th class
Answered By: Michael Alexander Date: created: Aug 07 2022
During pollination, a pollinium, which is frequently observed in plants like orchids and several species of milkweed, is a cohesive mass of pollen grains produced by just one anther but transmitted as a single unit.
Asked By: Diego Simmons Date: created: Jan 11 2022
What is pollinium example class 11
Answered By: Jesse Morgan Date: created: Jan 13 2022
Pollinia, or masses of cohering pollen grains, are produced by plants that resemble orchids and primarily aid in pollination. For instance, pollinia are found in the flowers of calotropis.
Asked By: Adrian Cook Date: created: Jun 20 2022
What is meant by Porogamy
Answered By: Samuel Ramirez Date: created: Jun 21 2022
Porogamy is defined as the entry of the pollen tube into a seed plant through the micropyle; see chalazogamy for a comparison.
Asked By: Thomas Lopez Date: created: Aug 06 2022
Who discovered pollinium
Answered By: Jesse Adams Date: created: Aug 09 2022
Polonium was discovered by Marie Skodowska-Curie and Pierre Curie in July 1898 when it was extracted from the uranium ore pitchblende and identified only by its strong radioactivity. It was the first element to be so discovered. Density (near r.t.) 20 W/(mK) (?)
Asked By: Jesus Foster Date: created: Jun 14 2021
Which of the following plant shows pollinium structure
Answered By: Stanley Moore Date: created: Jun 16 2021
Asclepiadaceae is the choice that represents the right response.
Asked By: Michael Roberts Date: created: Jun 04 2022
What is the main function of tapetum
Answered By: Isaac Bryant Date: created: Jun 05 2022
Functions of Tapetum Tapetum transports nutrients to the anthers, feeds the developing pollen grains, serves as a precursor source for the pollen coat, and forms pollenkitt by the tapetal cells surrounding the microsporocytes.
Asked By: Andrew Brown Date: created: Apr 05 2022
What is Nemec phenomenon
Answered By: Neil Bennett Date: created: Apr 08 2022
Nemec observed the development of pollen embryo sacs in Hyacinthus orientalis in 1898 and named the phenomenon after it. Nemec postulated that the large eight-nucleate structure was caused by the degeneration of the pollens generative nucleus, which is made up of the three divisions of the vegetative nucleus.
Asked By: Morgan Walker Date: created: May 05 2022
What is Corpusculum in botany
Answered By: Jeffery Cook Date: created: May 05 2022
A structure known as the “gland” that connects the two translators of the pollinia belonging to the Asclepiadoideae subfamily of the Apocynaceae.
Asked By: Richard Gray Date: created: Oct 20 2021
What is NPC system
Answered By: Harry Bennett Date: created: Oct 22 2021
NPC is a man-made classification scheme for pollen and spores that is based solely on the number, position, and character of the aperture. Erdtman and Straka (1961) first proposed NPC classification, and palynologists all over the world have since accepted it.
Asked By: Tyler Harris Date: created: Oct 08 2021
What is Micro Sporogenesis
Answered By: James Miller Date: created: Oct 10 2021
Microgametogenesis is the process of creating pollen grains from microspores, and microsporogenesis is the process of creating them inside of a microsporangium (or pollen sac).
Asked By: Timothy Peterson Date: created: May 31 2022
Which group of plant is pollinia
Answered By: Dominic Simmons Date: created: May 31 2022
The major group Angiosperms (Flowering plants) contains the genus Pollinia, which is in the family Poaceae.
Asked By: Devin King Date: created: Nov 28 2021
What is a Gynobasic style and where does it occur
Answered By: Donald Reed Date: created: Nov 29 2021
Gynobasic style is seen in the family Lamiaceae or Labiatae when the ovary is lobed and the style emerges from the depressions of the lobes of the ovary. Therefore, the correct response is “Lamiaceae or Labiatae.”
Asked By: Juan Sanders Date: created: May 23 2022
What is called stigma
Answered By: Harold Bennett Date: created: May 24 2022
Ovary: The enlarged basal portion of the pistil where ovules are produced. Stigma: The portion of the pistil where pollen germinates.
Asked By: Christian Murphy Date: created: May 23 2022
What do you mean by Microsporogenesis
Answered By: Sebastian Brooks Date: created: May 23 2022
Microgametogenesis is the process of creating pollen grains from microspores, and microsporogenesis is the process of creating them inside of a microsporangium (or pollen sac).
Asked By: Clifford Lopez Date: created: Jun 08 2021
Which groups of plants has pollinia
Answered By: David Mitchell Date: created: Jun 10 2021
The major group Angiosperms (Flowering plants) contains the genus Pollinia, which is in the family Poaceae.
Asked By: Diego Peterson Date: created: Oct 07 2021
What are the uses of herbarium
Answered By: Christopher Johnson Date: created: Oct 10 2021
Herbaria-based research is changing as a result of new technologies, access to digitized collections, and the availability of a large amount of data. Historically, herbaria were maintained as scientific institutions and gathering places.
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