Which of the following characteristics of plants is absent in the...

Question

Which of the following characteristics of plants is absent in their closest relatives, the charophyte algae?
a. chlorophyll b
b. cellulose in cell walls
c. sexual reproduction
d. alternation of multicellular generations

Accepted Answer

Welcome back. Let's look at the next question which statement is true regarding the multi cellular alternation of generation. And our four choices involve tarifi algae and plants whether one both or neither utilize this multicellular alternation of generations. Well, when we think back to our content videos, we recall that plants do indeed use alternation of generations as part of their reproductive process. So I'm just gonna put a little diagram here to kind of trigger our memory of that. And as we see, we have this alternation of generations between multicellular structures. The hapless give me fight the deployed for a fight. So this is used by plants. So we can actually go to our answer choices and eliminate the two choices A and see which have the selection absent in plants. So we've got two down already. So now let's think about the terrified algae. Well, these are part of the ancestral lineage of plants. Um They do reproduce sexually but only through fertilization. So the hap Lloyd gametes through fertilization, producing the deployed zygote. They do not have the multicellular structures of the spore a fight and get me to fight. So no multicellular alternation like plants do. And in fact um that alternation of generations was part of the evolution of land plants. Because the generation of those spores. The spores are very durable and dry conditions meant plants could survive on land. The spores could spread over distance whereas the zygote of the algae was dependent on water to survive. So the algae do not have this process. So let's look back at our answers here and we see that Choice B is present in both. So we eliminate Choice B and we know that our correct answer must be D It is present in plants but absent and clarified algae. See you in the next video.

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