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Ch. 29 - Plant Diversity I: How Plants Colonized Land
All textbooksCampbell 12th EditionCh. 29 - Plant Diversity I: How Plants Colonized LandProblem 3
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Chapter 29, Problem 3

In plants, which of the following are produced by meiosis? a. haploid gametes b. diploid gametes c. haploid spores d. diploid spores

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Welcome back. Let's look at our next question. Spores and plants are always produced by and we have four processes as our answer possibilities mitosis, mitosis, binary fission and fragmentation. Well, let's recall from our previous videos that spores in plants are hap Lloyd cells with a single set of chromosomes. But they are produced from cells in the sparrow fight that multicellular deployed structure in plants. I mean double the set of chromosomes and when we have parent cells that are deployed and they go through a process to produce daughter cells that are hap Lloyd, that process is my aosis that process of sexual reproduction. So when we look back at our answer choices, Choice B is mitosis and that will be our correct answer. But let's look at the other choices and see why they are not the correct answer for this process. So choice a mitosis is a form of reproduction where you always have the same number of chromosomes in parent and daughter cells. It is mainly used for an organism growing and you do not change the number of chromosomes mitosis. A is not the correct answer. Since we the spores have half the number of chromosomes as the parent cell. I see brian eri fishing is a method of a sexual reproduction. Cloning mainly used by pro carry outs in which a parent cell splits into two but it's cloning and the daughter cells also have the same number of chromosomes as the parent cell. So again not the process we're looking for that takes out choice see and fragmentation is a common form of reproduction in plants. But it is again a sexual process of cloning where you have a piece of a plant breaking off and then growing into a fully functioning adult plant. But again, all the daughter cells same number of chromosomes as the parent cell. So Choice D. Is not a choice B mitosis is the only process that gives us daughter cells with half the number of chromosomes. See you next time.
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Suppose an efficient conducting system evolved in a moss that could transport water and other materials as high as a tall tree. Which of the following statements about “trees” of such a species would be true?


a. Spore dispersal distances would probably decrease.

b. Females could produce only one archegonium.

c. Unless its body parts were strengthened, such a “tree” would probably flop over.

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