Question

What grows inside the structure pictured below?

Answer 1

Gametophytes

Flagellated sperm

Spores

Sporophytes

Answer 2

the flowers have the male and female gametes, so it has to be gametophyte

Answer 3

Okay, I have a few more questions. :)

Answer 4

Which life cycle components appear only in mosses and ferns?

Answer 5

Oh yeah, my options to choose from. :)
Pine cones

flagellated sperm

Sporophytes

pollen grains

Answer 6

i think sporophytes, mosses and ferns both produce sporophytes. mosses don't have pine cones or pollen grains. ferns don't have flagellated sperm, they have pollen that is dispersed by wind.

Answer 7

I see. You're teaching me by the way, whilst giving me the answers. Lol. I like it. :3
Angiosperms do not need water for fertilization. Why?

Answer 8

The flowers don't directly produce male/female gametes. To the best of my knowledge, they actually produce spores. The gametophytes, which produce gametes, are very very small.

Answer 9

lol, its better that you learn :)
angiosperms have adapted to living on the land. The primitive plant species were dependent on water of fertilization as the had flagellated sperm but angiosperms produce pollen that is dispersed by wind. Pollen is non-motile and does not need water to reach the female egg, but lands by wind on the stigma and then forms the pollen tube which eventually takes the male gamete to the female egg in the ovule where fertilization occurs.

Answer 10

Well, my options are Flagellated sperm travel to the ovary inside the pistil

Pollen stays inside the cone scales to fertilize eggs

A pollen tube grows from the pollen grain into the ovary

The sporophytes grow directly from the gametophytes
....

Answer 11

@Calliope what i meant to say was that the flowers have structures that contain male and female gametes. :)

Answer 12

@careless850 read what I wrote, you'll get your answer

Answer 13

@physicsme I'm afraid I have to disagree with your answer :) A Sporophyte produces the spores, and pretty much all plants have that stage.

There are two trends that you need to be aware of in plants: the reduction of the gametophyte and the adaptation to live on land. With the reduction of the gametophyte, it goes from being dominant in mosses (the green leafy bit that you see is the gametophyte) to only consisting of a few cells in angiosperms.

To conquer land, plants needed to reduce their dependence on water. Flagella mean that water is involved, and water is indeed absolutely essential for sexual reproduction in mosses and ferns. Gymnosperms and angiosperms do not have flagellated sperm... although there is one exception: Ginkgo, a very primitive gymnosperm.

Answer 14

@Calliope yes, you are right, i was giving the answer in accordance with the options.

Answer 15

@physicsme A flower, part of an angiosperm sporophyte, produces spores. By definition :)

Answer 16

@Calliope yup :)

Answer 17

wait.. what's my answer and what question are you talking about?

Answer 18

@careless850 i was talking about your last question and the long para i wrote has the answer to it.

Answer 19

THe third one?

Answer 20

yup, the one with the angiosperms :)

Answer 21

Which of the following is true of conifers?

Female cones produce pollen that fertilizes the egg.

Most coniferous trees have both male and female cones.

Male cones cannot produce pollen unless fertilized by the female cone.

Female cones produce pollen that is trapped by the male cones’ scales.

Answer 22

@careless850 I was talking about the first two questions you posted and why I disagree with @physicsme's suggested answers.

Answer 23

And... @careless850, could you please give us some indication of what answer you think might be correct? It would also help if you would tell us why the question is confusing you. What is it that you don't understand about plant life cycles?

Answer 24

I know nothing about biology. That's my main problem. :/ I've failed it almost 3 times. I'm on my 3rd time going through it and I'm still struggling. I only have like 2 more modules and I'll get my credits for this class. I'm sorry if I seem like I'm just looking for answers, but I just don't understand it at all and I'm behind a week.

Answer 25

Ok, here's what you need to do: find a textbook and READ :) Seriously, it'll help. Alternately, read over the notes that you have for your class and/or information provided by your teacher. The answers to all your questions WILL be in the material that you've been given. They wouldn't ask questions about things that you haven't learned about, would they?

Answer 26

yup, self study is the best study :)

Answer 27

And yes, I know it's a lot of information to memorise. That's how biology is, I'm afraid. But if you sit down and stare at the information long enough, some of it will lodge in your brain and you'll be fine.

Answer 28

True. If I had TIME to read all of the lessons. As I said, I'm behind. :/

Answer 29

family issues, by the way.

Answer 30

You make time. That's what I did last semester. I fell behind (in my defence, I'm an English-speaker studying in German, and I hadn't taken a biology course in many years), and since I didn't want to fail, I parked myself in the library for hours on end in the weeks before my exams and studied really really hard. And I got pretty good grades too :)

Answer 31

So it is possible!

Answer 32

I understand it's possible. I have many other subjects I'm { almost } behind in, as well. I'm just trying to get caught up for this week for bio.

Answer 33

If you don't want to give out the answers, it's fine. I understand.

Answer 34

Well, I'm happy to help, but if you want to catch up, you need to UNDERSTAND the material. Simple answers won't help, because then you might get your homework done, but you'll have a harder time understanding the next module. So... I need to know what you're having trouble with so I can explain it and help you learn.

Answer 35

honestly, biology in general. I just suck at biology. I'm more into Computer programming than anything. :/

Answer 36

Biology is, for the most part, just facts facts facts. Lots and lots of information about living things. Luckily, and this might help you if you're into programming, there are a lot of patterns involved. If you can learn the patterns, that will make a lot of things easier.

In plants, for example, as I said in an earlier post, there's a trend toward the reduction of the gametophyte. The gametophyte is what produces the gametes (eggs and sperm) for sexual reproduction. In mosses, it's what you see: the green leafy bit. The sporophyte, which produces the spores (that's asexual), is generally a little capsule on a stalk, so... the dominant stage is the gametophyte. In ferns, the gametophyte is a weird little thing that the sporophyte (what you generally think of as a fern) grows out of. Since the big, visible part is the sporophyte and the gametophyte is small and not so noticable, that means the sporophyte is dominant. And in higher plants, especially angiosperms, the gametophyte is so reduced that in the case of the male gametophyte, it's only two cells inside a pollen grain!

Answer 37

Here, these life cycle diagrams might help:
Moss: http://www.esu.edu/~milewski/intro_biol_two/lab_2_moss_ferns/images/29_08-MossLifeCycle_3-L.jpg

Fern: http://bio1151.nicerweb.com/Locked/media/ch29/29_12FernLifeCycle.jpg

Angiosperm: http://media-3.web.britannica.com/eb-media/12/5612-004-B7054A15.gif

Answer 38

Do you have any questions about any of that? Anything that you don't understand?