Gametophyte

and will become independent plants. A multicellular plant develops, and all its cells will have a single set of chromosomes, this happens when the haploid spores germinate and grow by mitosis. This stage of the life cycle is called gametophyte generation. The gametophyte plant matures and produces specialized cells, they will form gametes,

can produce hermaphrioditic gametophytes in order to be able to self fertilize. However, some of the homospourous C-ferns only produce male gametophytes .The life cycle of Ceratopteris richardii starts as a diploid sporophyte which then, by meiosis, produces haploid spores. These spores then undergo mitosis to produce a haploid gametophyte, which can be either hermaphrodite( producing eggs and

example the spores are found on the underside of the leaves. They are found in cases called sori and each sorus holds many spores which are haploid. Spores are released and they form gametophytes. Gametophytes make gametes which are also haploid and both the egg and the sperm of the fern are created in the gametophyte, but in different parts. The egg is made in the

ammonium nitrate has on the germination days of C-Fern gametophytes by constructing an experiment with two spore-sown petri dishes, one control and one treatment – a normal nutrient-rich agar petri dish and an ammonium nitrate-containing petri dish respectively. The two petri dishes were each inoculated with three drops of spore suspension by a pipet, then spores were spread by a sterilized-bent paper clip to allow even distribution of spores. Gametophyte germination occurred approximately two weeks after

In “ The Spandrels of San Marco and the Panglossian Paradigm: A critique of the Adapationist Programme” by Gould and Lewontin the article discusses about natural selection not being the overall general reason for the evolution of species. Gould and Lewontin provide a pluralistic approach of how species are evolved rather than basing on natural selection. Therefore, these scientists used the central dome of St Mark’s Cathedral in Venice to represent the other possible explanations of the evolution

January 24th, 2014 Forensic Science/ Mod 3 Chapter 5 Test True or False: 1) Pollen is an example of trace evidence. Answer: True 2) Through microscopic examination of pollen or spores, it is possible to identify a specific plant that produced that pollen or pore. Answer: False 3) All Pollen & Spores are produced continuously throughout the year. Answer: False 4) With the exception of bacterial endospores, pollen & spores are reproductive structures. Answer: True 5) Spores are

Discussion: Statistical analysis of the experiment shows that the data of the ANOVA single variable test comparing the means for percentages of male gametophyte density, where no outliers were present, yielded a p-value of 0.00861, which is a p-value< 0.05, which suggests a possible relationship between spore density and male sex determination. Therefore, the means can be described as being significantly different, meaning that we can fail to reject the hypothesis that, if spore density is elevated

great way to predict future genetic information on more than just the C-Ferns. In this experiment, two different generations for gametophytes and sporophytes of C-Ferns were observed and counted for the amount of wild type and polka dot mutant individuals within a sample and a population. The overall results demonstrated a 1:1 ratio of mutant to wild type in the F1 gametophyte generation for both the sample and population, which was expected. The F1 sporophyte generation demonstrated a 1:1 ratio of mutant

Question 1: Plate Tectonics (20 points) Plate tectonics is a theory where earth’s crust in the lithosphere is made up of plates that float on a hot layer of molten magma in the asthenosphere, and moves constantly and under different circumstances causes mountains, volcanoes, and earthquakes to appear. With the evidence of plate tectonics and fossils, it is believed that about 225 million years ago, all the major continents had formed one giant continent known as Pangaea. However, due to possible

character states for each moss, fern, Gymnosperm, and Angiosperm. The character states for this table were terrestrial, embryo, dominant sporophyte, vascular tissue, seeds, secondary growth, flowers, fruit, gametophyte dependent on sporophyte, pollen, sporophyll, sporophyte dependent on gametophyte, Archegonium, and double fertilization. So how do these characters