Food for Thought Some botanists consider the stoneworts to be a link between the
ID: 255462 • Letter: F
Question
Food for Thought Some botanists consider the stoneworts to be a link between the higher plants and the algae. As you will learn in future exercises, higher plants, such as the mosses, have both haploid and diploid stages that are multicellular 6. (a) Describe the multicellular organism in the charophytes (b) Is this organism haploid or diploid? (c) Is the zygote haploid or diploid? (d) Is the zygote unicellular or multicellular? . (a) What color are the marker lights at the edge of an airport taxiway? (b) Are the wavelengths of this color long or short, relative to the other visible wavelengths? (c) Which wavelengths penetrate deepest into water, long or short? (d) Make a statement regarding why phycobilin pigments are present in deep-growing red algae. (e) What benefit is there to the color of airport taxiway lights for a pilot attempting to taxi during fog8y weather?Explanation / Answer
6 a) Charophytes are the multicellular organism that is a link betwwen the algae and the plants. It means that it has traits of algae as well plants. So this is the group of algae which is most similar to plants than any other algae. The traits they share with multicellular plants are: Cell wall with high cellulose content, flagellated sperm cells, apical growth, distinct nodes and internodes rae present, non mobile body and oogonia and anthredia are the reproductive organs producing egg and sperm respectively.
b) They alternational of generation. The basic plat is a haploid gamatophyte and it produces haploid male and female gamates.
c) Haplod gamates fuses to form a diploid zygote (2n).
d)Zygote is unicellular.