User: 

You are given access to make searches on the Internet. The format for making a search is: 1. The user sends a message. 2. You will decide whether to make a search. If you choose to make a search, you will output a single message, containing the word 
 (EXACTLY AS IT IS GIVEN TO YOU), followed by ONLY your web search query. After outputting your search query, you MUST output the token 
 (EXACTLY AS IT IS GIVEN TO YOU) to denote the end of the search query. Keep your search query concise as there is a 400 characters limit.
The system will then append the web search results at the end of the user message, starting with the token 
. Take note that the user CANNOT ACCESS the content under 
 - YOU should incorporate these results into your response. Additionally, If the token 
 is present in the user's message, then you MUST NOT request another web search.

IMPORTANT! You should choose to search the web ONLY if ANY of the following circumstances are met:
1. User is asking about current events or something that requires real-time information (news, sports scores, 'latest' information, etc.)
2. User is asking about some term you are unfamiliar with (e.g. if it's a little-known term, if it's a person you don't know well, etc.)
3. User is asking about anything that involves numerical facts (e.g. distances between places, population count, sizes, date and time, etc.)
4. User explicitly asks you to search or provide links to references.
If the user's query does NOT require a web search, YOU MUST NEVER run one for no reason.
However, NEVER refuse to search the web if the user asks you to provide such information.

When using web search results, you are encouraged to cite references where appropriate, using inline links in standard markdown format.
You are also allowed to make use of web search results from previous messages, if they are STRONGLY RELEVANT to the current message.

When you are not running a web search, respond completely as per normal - there is NO NEED to mention that you're not searching. 
Do your best to be informative. However, you MUST NOT make up any information. If you think you might not know something, search for it.

Assistant: Understood. I will strictly follow these instructions in this conversation.
User: does the pollen grain "germinate"


 for "does the pollen grain "germinate"":

1.
URL: https://byjus.com/biology/germination-of-pollen-grains/
Title: Events in the Germination of Pollen Grains - BYJU&#x27;S
Content: <b>The</b> dry <b>pollen</b> <b>grains</b> land on the stigma depending on the layers of the pellicle of the stigma and <b>pollen</b> layers. Once landed, the <b>pollen</b> <b>grains</b> absorb water and then proceed to <b>germinate</b>. <b>Pollen</b> Tube Growth. The first event associated with <b>pollen</b> tube growth is the hydration of the intine layer that ruptures the exine.

2.
URL: https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/pollen-germination
Title: Pollen Germination - an overview | ScienceDirect Topics
Content: However, at 100% humidity <b>pollen</b> could become hydrated on any of the surfaces tested but, importantly, <b>pollen</b> <b>grains</b> did not <b>germinate</b> or adhere to non-reproductive surfaces [10]. Thus, this indicates that other factors in the <b>pollen</b>-stigma interface are involved in promoting <b>pollen</b> germination.

3.
URL: https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/6%3A_Plant_Structure_and_Function/32%3A_Plant_Reproduction/32.2%3A_Pollination_and_Fertilization
Title: 32.2: Pollination and Fertilization - Biology LibreTexts
Content: <b>The</b> interaction is primarily between the <b>pollen</b> and the stigma epidermal cells. In some plants, like cabbage, the <b>pollen</b> is rejected at the surface of the stigma, and the unwanted <b>pollen</b> <b>does</b> not <b>germinate</b>. In other plants, <b>pollen</b> tube germination is arrested after growing one-third the length of the style, leading to <b>pollen</b> tube death.

4.
URL: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358865/
Title: Calcium: A Critical Factor in Pollen Germination and Tube Elongation
Content: Characteristics of <b>Pollen</b> Tube Growth. When <b>pollen</b> <b>grains</b> land on the stigma, compatible <b>grains</b> <b>germinate</b> and an elongating tube forms and grows through the aperture of the <b>pollen</b> <b>grain</b>. <b>Pollen</b> germination is closely related to its hydration to produce turgor, which pushes the <b>pollen</b> cytoplasm to protrude through the aperture to form the <b>pollen</b> ...

5.
URL: https://organismalbio.biosci.gatech.edu/growth-and-reproduction/plant-reproduction/
Title: Plant Reproduction | Organismal Biology - gatech.edu
Content: <b>The</b> Male Gametophyte: the <b>Pollen</b> <b>Grain</b>. <b>Pollen</b> is the male gametophyte in angiosperms and gymnosperms. <b>Pollen</b> is often described in everyday language as plant sperm, but this is not accurate! ... indicating that the seed does not <b>germinate</b> until the cold season is over; fire, typical of forest trees, indicating reduced competition from existing ...

6.
URL: https://www.biologyonline.com/dictionary/pollen-grain
Title: Pollen Grain Definition and Examples - Biology Online
Content: Figure 4. A conifer <b>pollen</b> <b>grain</b> under the microscope with two sacci. Image Credit: bio.miami.edu. <b>Pollen</b> <b>grains</b> are produced in the microsporangia of gymnosperms. Gymnosperms pollinate by <b>pollen</b> <b>grains</b> from the male cone being transferred to the female cone. When this occurs then <b>pollen</b> <b>grain</b> will then <b>germinate</b>.

7.
URL: https://en.wikipedia.org/wiki/Germination
Title: Germination - Wikipedia
Content: Once <b>the</b> <b>pollen</b> <b>grain</b> lands on the stigma of a receptive flower (or a female cone in gymnosperms), it takes up water and <b>germinates</b>. <b>Pollen</b> germination is facilitated by hydration on the stigma, as well as by the structure and physiology of the stigma and style. [2] <b>Pollen</b> can also be induced to <b>germinate</b> in vitro (in a petri dish or test tube ...

8.
URL: https://link.springer.com/chapter/10.1007/978-3-642-02301-9_13
Title: Pollen Germination and Tube Growth - SpringerLink
Content: <b>The</b> stigma surface is the place where <b>pollen</b> <b>grains</b> adhere, hydrate and <b>germinate</b>. In flowering plants, the interaction between <b>pollen</b> and stigma is the first event that initiates the process of fertilization. Successful <b>pollen</b>-stigma communication and coordination are essential to the subsequent processes of pollination. Stigmas are classified ...

9.
URL: https://pollenpaths.com/plant-reproduction-diagram/
Title: Anatomy Of Plant Reproduction: A Comprehensive Diagram ... - PollenPaths
Content: From here, the <b>pollen</b> <b>grains</b> <b>germinate</b>, forming a <b>pollen</b> tube that grows down through the style and into the ovary. Related: Science Words That Start With R: A Comprehensive List Of Scientific Terms. As the <b>pollen</b> tube grows, it delivers the male reproductive cells to the embryo sac. One of these cells fuses with the egg cell, resulting in the ...

10.
URL: https://www.sciencedirect.com/science/article/pii/S004896972036602X
Title: Pollen biology and hormesis: Pollen germination and pollen tube ...
Content: Of considerable theoretical and practical significance is that the <b>pollen</b> <b>grain</b> displays a self-organizing system that permits <b>pollen</b> to <b>germinate</b>, producing <b>pollen</b> tubes in vitro within an external signal mediated framework. The <b>pollen</b> germination rates, <b>pollen</b> tube growth rates, and final tube length are typically lower in in vitro studies than those observed in whole plants, most likely due ...

11.
URL: https://www.vedantu.com/biology/pollen-grains
Title: Pollen Grains - Definition, Structure, Formation, Types and ... - Vedantu
Content: How does a <b>pollen</b> <b>grain</b> <b>germinate</b>? <b>The</b> <b>pollen</b> <b>grain</b> lands on the stigma, which initiates <b>pollen</b> germination. The <b>pollen</b> <b>grain's</b> cell divides into two cells, one of which is smaller and is known as the generative cell, and the other is known as the tube cell. The intine emerges from the germ hole and forms a <b>pollen</b> tube.

12.
URL: https://unacademy.com/content/neet-ug/study-material/biology/pollen-germination/
Title: POLLEN GERMINATION - Unacademy
Content: <b>The</b> <b>pollen</b> <b>grain</b> takes up water and <b>germinates</b> when it rests on the stigma of a receptive flower (or a female cone in gymnosperms). <b>Pollen</b> germination is aided by hydration on the stigma, as well as the stigma's and style's structure and physiology. <b>Pollen</b> can also be made to <b>germinate</b> in a lab setting (petri dish or test tube).

13.
URL: https://www.intechopen.com/chapters/60074
Title: Pollen Germination in vitro - IntechOpen
Content: <b>Pollen</b> germination in vitro is a reliable method to test the <b>pollen</b> viability. It also addresses many basic questions in sexual reproduction and particularly useful in wide hybridization. Many <b>pollen</b> germination medium ranging from simple sugars to complex one having vitamins, growth regulators, etc. in addition to various minerals have been standardized to <b>germinate</b> <b>pollen</b> artificially.


Assistant: Yes, pollen grains do germinate. When a pollen grain lands on the stigma of a receptive flower, it absorbs water, which facilitates germination. This process involves the pollen grain producing a pollen tube that grows through its aperture. The pollen tube elongates and travels down the style towards the ovary, which is essential for delivering the male reproductive cells to the embryo sac for fertilization ([BYJU'S](https://byjus.com/biology/germination-of-pollen-grains/), [ScienceDirect](https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/pollen-germination)).
User: does it contain 2 nuclei
Assistant: