Gymnosperm (Pine) Life Cycle

[@mamaboocee]

I am 65 years old and just now discovered the source of the pollen on the pine trees in my yard. This year, the trees have many new little pine cones dripping with a fragrant syrupy substance, as well as the small pollen producing with ones tiny little cones that looked like a strange red elongated flower about to bloom. Last year, i started feeding the birds underneath these trees by just throwing the seed down on the ground. This spring they have more growth than I have seen since previous years. I would like to think that the bird poop had alot to do with it! Its marvelous to see how the trees grow and change over the seasons and years. These particular trees were purchased as live Christmas trees more than 50 years ago, and planted in the yard after the holiday season was over. They are over 75 feet tall, and provide cover and nesting areas for the birds, squirrels and other wildlife. There are 3 of these "Christmas trees" in the yard. We also utilize the pine cones for decoration as well as fallen branches. It is strange, the things you look at every day but never seem to think about - they have secret lives. We all need to be more aware of nature. Thanks for this informative video.

[@pinheadlarry2506]

65? You look 45. What do you do to take care of yourself i need to know lol

[@sauravzadav7449]

@@pinheadlarry2506 stop flirting man..😂😂

[@pinheadlarry2506]

@@sauravzadav7449 Brother I’m 23 I’m just trynna get a head start on what she does cuz she does NOT look her age🤣

[@whdgk95]

you are a life saver. Your work is highly appreciated by all students. Thank you.

[@AlinaAlign]

I'm taking a plant biology class at my university and this helped so much! Thank you for making this!

[@sithisrants4154]

Thank you so much. My botany professor took 50 minutes to poorly explain what you made clear in 5 minutes. This was so helpful.

[@CraigSavageScience]

The best way to think about it is to consider if the cells you are looking at are haploid (gametophyte and gametes) or diploid (sporophyte). The cells of the pine "tree" are diploid so they represent the sporophyte generation. The only haploid cells are found in the cones after meiosis.

[@kwokhoso6344]

I made many confusion on my teachers note of pine life cycle.but now i understood the principle!thanks a lot!!

[@sanz1e644]

“No- no insects involved here” I love this man

[@abhijitsombhatla7914]

Thank you so much, this video has helped me a lot for my biology of plants exam and you have made one of the most complex topics very easy to understand as well as great fun!

[@sakshamjangoda6331]

Thank you bro you just clear my all doubt your explanation is amazing i appreciate you

[@satoshinegi311]

Uh r the best teacher of bio... Hats off !!to u sir!! ...

[@Canakar360]

Your voice is so soothing! Way to go, this is a great way to study for my exams

[@Emma_729_WU]

I checked a few of those videos about the gymnosperm, this is the best one! thank you !.

[@mayra_1499_real_fact]

Hello।।🦋🦋 Friend,

[@durgashaw1782]

A big thanks to you man.... I've been searching for this kind of video since past 1 week.. Thanks a lot...

[@nataliaderossi7249]

Your voice is pretty hypnotising, hope you teach in real life

[@محمدريان-ك4ذ]

Hiii natalia

[@WajidAli-bh6ur]

Hi

[@emadaziz745]

@@محمدريان-ك4ذ بس يا حكيك

[@pavanns4]

U r russian right?

[@adityaprakash2996]

simps 😂

[@vihaansaxena7983]

Brief and very clear. Thank you so much ☺️

[@Alicethewise]

You have a really good narrator's voice. You pronunciate things very clearly and well. Thumbs up!

[@xLadyRose]

I had trouble understanding the cycle from reading it. Thanks to you I could finally visualize it and understand it fully

[@lizzyinthahizzy]

This really clears things up for me. I've learned more in the past 5 min than in the last 2 weeks! THANK YOU!!

[@allofdestiny]

My general Bio II class starts off with this topic. Great overview. Gonna go watch the angiosperm video now

[@aamir7559]

So you are now KZbinr

[@ariesjay9947]

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[@stanleyxander7944]

@Aries Jay instablaster =)

[@ariesjay9947]

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[@ariesjay9947]

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[@Marvel_nails]

Indeed i have learned something...I like your way of explanation (clear). Thank you

[@mudassirahemadansari6098]

excellent way to understand life cycle in gymnosperm and angiosperm....thanks

[@teodorpeev1444]

Excellent video, sir!

[@claudiusmaximus319]

That was very helpful! Thanks all the way from Africa!

[@HamnaAzhar7]

Thank u v much these angio and gymno videos are great. You made it so easy for me

[@allifazhar]

Thanks for this video. This video cleared my doubt of poloidy of Endosperm 😊😊..

[@digiconvalley]

i love plants now, all because of you sir!

[@shyguykc]

I had no idea so much was going on in this life cycle. Thanks for the vid.

[@sabakhan-qc9di]

There is even more going on, actually... the video is incomplete

[@sabakhan-qc9di]

Like he didnt tell abt the pollen tube... or how actually does the sperm inside the pollen form .

[@sabakhan-qc9di]

It is written in my book though

[@themightyhunters]

your voice is soo hypnotizing..... you would be a really good teacher

[@manmeetdhaliwal4081]

Very nice sir u made it easy for us

[@porenesianparapio6934]

😭😭 Why did I not watched this video before, dude you're life saviour 😭👏👏👏

[@aena_]

Well done and keep the good work up!

[@ishapatel3419]

Thanks for the Vedio 👍

[@dexterhernandez9553]

not so confusing now that I've seen your video...... thanks a lot bro..!!

[@kaitlynlonsdale7595]

Thank you, this video helped me understand this 100%! Much more of a fun way to study while understanding, rather then reading a textbook or trying to go on quizlet. Love the gymnosperm and angiosperm video. My test is next week so this helped to study a lot :)

[@mitalipandey5460]

Superb sir 👍🏻 Lots of luv and blessings 4 u 😘😘

[@meowhellokittyx33]

YOU ARE SO GOOD! please make more videos!!

[@carlol7664]

good summary of the Basics

[@ramonvera2318]

Great video , good explanation 👍🏻🌲

[@maira3456]

Excellent explanation

[@naturebeauty835]

Awesome explanation... Lot s of thanks from India country

[@pub_scrubs]

excellent video ! i was frustaed about my bio. exam , and i found this great video, thanks a lot craig

[@in._.sane0104]

Thank you for such a informative video

[@khunshakhan8930]

great video!

[@CraigSavageScience]

the best answer to that question is to watch my video on angiosperms lifecycle and then make the comparision but in short the reproductive structures are very different (cones vs flowers) the fertilization event is different - single vs double - so the nutritive tissue is different 2n vs 3n and the resulting seed is different - covered vs uncovered - therefore dispersal is different

[@ericklarson6684]

Great video - but should have included a bit more on the gymnospore pollen - particularly the wings.

[@kumarmukesh6961]

Very very pretty voice.....liked ur way of teaching....

[@Pinakrankhamb]

Khatarnakkk I loved it

[@deepthireddyvasi2075]

top-notch vid.now i understand it better.u deserve a hat-tip mr.craig

[@dianaalzareef7776]

Excellentttt explanation!!!!!!!!! It's really helpful

[@animallovers1626]

Mastch vdo 👌👌👌👌❤

[@aaaz5643]

Great work!!!!!

[@jandraskovic5638]

Great job man !!! Keep it up

[@XxDarkRaverxX]

Omg please do ASMR!! I love your voice!! 💗💗🙏🙏

[@vishwasjadhav512]

nice explanation

[@user-vb9uh5th5d]

wonderful video, thanku so much

[@MohamedAli-db7sv]

Great job man

[@dggamers9175]

from India but can understand you language clearly thank you sir

[@CraigSavageScience]

Glad you found it helpful

[@mariasilviamartinez4558]

Eu estava esperando um vídeo sobre as Gimnospermas. As Araucárias são exclusivas do Brasil e os pinhões são uma ótima fonte de alimento. 👍💖

[@TopShelfShi]

Thanks, very easy to understand.

[@enriquedayon6485]

When he teach I feel like I answered all of my question😸😸👍🏻👍🏻👍🏻

[@mousslimahlilleh598]

excellent video ! do you have any other speaking about the diffrent types of placentation ?'cause it really hard to understand

[@amritakarmakar8953]

How do we know that the seed will produce the male pine tree or the female one?

[@elizabeth8793]

Pine trees have both male and female cones on the same tree. Female (ovulate) cones are found in the higher regions of the tree, while the male (staminate) cones are found in the lower regions of the tree. Other trees, such as Ginkgophytes, have separate male and female trees, which I think is what you're thinking of in your question. Pines, however, have both male and female parts in each tree. I hope this helped answer you question. :)

[@indepth001]

Super. I understood easily with this video about the life cycle of gymnosperms tnq for making this video

[@Gossette521]

You are great ! This helped me a lot !!!

[@anggerpribadi4397]

I was in headache for real when work in my biology task before watch this. Thanks a lot!!

[@chrisgoldbach4450]

Do the eggs and seeds look the same once they drop? Im thinking they are just seeds but now I wonder now that i have popped them all out to stratify.

[@cloudy6256]

Ain’t no way this is like 10x more efficient that the textbook I spent 80 bucks on.

[@Nipsoj]

nice video!

[@minahilattiq9827]

sir will u please give us a lecture on difference between sporophyte and gametophyte generation........ it is confusing me soooooo muchhhh

[@beyondkun]

Thank youuuu I didnt understand what was going on inside the cones regarding spores and gametes until now

[@HusseinHafez]

thanks for the video. very informative. my daughters question is if the female pinecone falls on the ground can it still be fertilised by the pollen carried by the wind?

[@kduck2768]

Great video, tho it lacks some details, like the pollen tube and the process of fertilization itself, it still helped. Thank you

[@wineberryovergold4114]

So the seeds inside the cone have to be pollinated in order to be able to properly germinate?

[@irule11846]

I thought gymnosperm spores do double fertilize the egg and as such do not produce an endosperm? In fact my textbook has double fertilization listed as an exclusive feature of angiosperms.

[@lovelyperson9]

Right. My professor says the same, that double fertilization is exclusive of the angiosperms. I think Craig got it a bit confused. What happens in gymnosperms is one sperm will fertilize the egg, and the other sperm from the pollen tube will degenerate. The zygote develops into an embryo. The integument hardens to become the seed coat. No double fertilization, because double-fertilization results in a _fruit_, which is different from a seed coat.

[@gordonbristowe5987]

Michi Desu Nowhere in this tutorial does Craig mention double fertilisation. If he said the endosperm had been fertilised he would have given it diploid status (2n), but he says it is haploid (n). If there is no endosperm it will not be a seed - the endosperm is a defining characteristic of a seed.

[@jenthehen1276]

amazing video. thank you - a college student

[@CraigSavageScience]

Glad you enjoyed it!

[@acupkai]

what is the integument here? have you shown it? if so, could you please explain more about it? thank you so so much for this.

[@mehrankhan9387]

Intagument mean skin but there it mean a protective layer around femal gemetophyt and oospore from external environment effects.

[@sajehenschell8413]

are the two examples of female cones at different stages of reproduction? the one thats more opened up being at the stage where the seed is released and the one that's closed up waiting for fertilization? or were they two different types of female cones all together!!

[@slayplay2924]

best video but u should describe about the structures as well

[@ratebsoltan3371]

thank you but i think the megaspore will develop to two or more archegonia inside the gametophye and each archegonia has its egg not - endosperm

[@pamelaq8028]

Thanks for this explanation.. It made it very easy to understand :)

[@vivekmehta7882]

isnt the endosperm diploid as we have 2 male gametophytes, one combining with egg and other combining with endosperm?

[@absinthe_apostle]

Very helpful videos, not too fast either.

[@abiralsubedi1592]

this is best video .this is the way to make understand other... it would be more if u sho the real cone and their inner part by your hands i am waiting

[@abrahamrivera3792]

Sorry. At minute 1: 54, you said the male gametophyte in seed plants is pollen. But you were talking about gymnosperms, which are seedless plants. Could you please explain?

[@abrahamrivera3792]

I'm sorry what was I thiking.... you're correct! My bad

[@tariqhassan438]

Gymno means naked and sperm used for seed

[@tripdibasumatary5066]

Sir.... Why is the seed of the gymnospermic plants naked? Explain

[@stefanzaharievski7067]

Just want to say, thanks man. This video and the angiosperm one together basically cover 10 pages in my bio textbook, and it was a bitch to read through that. Listening to you tho you make it clear and coherent. Well done and keep the good work up!

[@suphaters]

Sometimes whole pine cones are found on the ground. Are those unfertilized? When do pine cones fall off the tree?

[@corlibarnes411]

At which points does the phase change from "sporophyte' to "gametophyte"? If you were to draw out a cycle and label this, where would put the labels?

[@muhammadrehman2771]

I just couldn't understand how the pollen grain manages to get to the ovule; through the wood of the female cone???

[@ericarosales7727]

great video!!!!

[@Amaxj]

Question; If we identify plants as being sporophyte or gametophyte dominant, usually in reference to the part of the plant we SEE and identify as the plant itself (Ex. In mosses, the green mossy part is the gametophyte.) Then in the case of the pine, which part is the tree itself considered? Like the trunk and leaves and whatnot? Or is Gametophyte and sporophyte purely used to identify the reproductive parts of the plant, and the trunk and leaves would be considered neither?

[@07aniketdeysarkar26]

Thank you. This helped a lot.

[@govindnair3135]

Thank you sir Very helpful

[@yasirbilal743]

Superb Sir Thanks alot :)

[@Lolablue1986]

It is a great video. I can't believe 1) i actual was looking for this on my own and 2) that is has over a hundred thousand views.

[@pagm4n]

This is a great walk-through of the gymnosperm life cycle, and I think I understand a little more that the ovulate and staminate cones themselves are the mega and micro-sporangia, the pollen grain and ovule are the micro and megaspores, and the pollen and eggs are the micro and megagametophytes. I'm still a little confused on Angio sperms, but I think I can handle this. I might be ready for my midterm tomorrow afterall! Thanks for the video!!!

[@asmasharif987]

sir please define megaspore mother cell. what does it come by? I mean any background?

[@sauravzadav7449]

thanks alot teacher..💕💕 please improve animation quality..

[@cairoshuffler5916]

very good video, thanks.

[@KiEfErThEnOoB]

This is great thank you! I think the "endosperm" that nurtures the embryo is actually called "Perisperm" that is haploid in gymnosperms? because endosperm is triploid?