There has been a tendency toward dominance of the diploid phase of the life cycle in the land plant lineage, and recent analyses suggest a similar trend in the brown algae. How to setup a halimeda aquarium university of hawaii. Choose a colour set that matches your algae sample closest and pick it. Diploid sporophytic generation alternating with haploid gametophytic generation. Students learn that breaking apart algal cell walls enables access to oil, starch, and cell wall sugars. Over 10 million scientific documents at your fingertips. Attack of the killer algae super teacher worksheets. Brown algae show an alternation of generations similar to that found in the from bio 106 at nassau community college.
Meiosis and the alternation of generations ucd plant. The vegetative algae that is seen in marine habitats is the haploid i. The activities and lesson plans are designed for elementary school, middle school, and may be adapted for high school students. The project measures the growth rate of algae supplied with supplemental carbon dioxide. However, algae are actually neither plants nor animals. Many small algae reproduce asexually by ordinary cell division or by. The nutrient levels, salinity, water temperature, light, and number and type of fish in the aquarium must be closely monitored every day. Students will explore how to grow poplar for bioenergy, measure carbon storage, compare different biofuels to fossil fuels, and measure their carbon footprints. Photosynthesis is a science topic that is included in many middle school texts. The origin of alternation of generations in land plants. Salt concentrations of 3%, 6%, 25%, 50% sea water were tested in apbs 20. Through this lesson, plantsand specifically algaeare presented as an energy solution. The goal is to have the student conduct a controlled experiment to test a hypothesis about.
Using plastic soda bottles, pond water and fish tank aerators, they vary the amount of carbon dioxide or nutrients or sunlight, as an extension available to the microalgae. Brown algae show an alternation of generations similar to. Algal bloom experiment page 1 suggested curriculum links grade 8 water systems on earths surface. Alternation of generations also known as metagenesis is the type of life cycle that occurs in those plants and algae in the archaeplastida and the. Algae fuel science fair projects and experiments view experiment find out whether microalgae can produce biooil which can be turned into biodiesel view experiment algae as fuel of the future faces great expectations and obstacles view experiment college experiments, labs, studies and articles. The specific events that accompany habs vary depending upon the species of algae involved. We believe that the algaeinabottle experiment offers an effective means for improving science literacy and for introducing scientific research to diverse learners from middle school to college. Summary life histories of photosynthetic eukaryotes traditionally. Some species of red algae have a complex triphasic alternation of generations. This pdf file is licensed for distribution in the form of electronic reprints and by way of. In a multiweek experiment, student groups gather data from the photobioreactors that they build to investigate growth conditions that make algae thrive best.
An overview presentation is suitable for 10th grade. In some cases, algae grow at unusually rapid rates and overgrow other species, alter habitats, or deplete oxygen even though the algae produce oxygen while they are alive, large amounts of decaying algae can consume enough oxygen to cause a net depletion. This is a simplest and most primitive type of lifecycle. Asexual reproduction occurs in unicellular and multicellular organisms. Harmful algal blooms habs are a phenomenon in which particular harmful species of algae reproduce in prodigious quantities and upset the ecological balance in aquatic habitats. Students are introduced to biofuels, biological engineers, algae and how they grow photosynthesis, and what parts of algae can be used for biofuel biomass from oils, starches, cell wall sugars. Such lifecycle is known as haplobiontic type of lifecycle.
Kelp are an example of a brown alga with a heteromorphic alternation of generations. Or, algae may show up as the poisonous red tides that bloom near. For this science lesson plan, students examine what green algae is and where it grows. With help of this pigment brown algae can also utilize yellow and green light for assimilation.
Student learning outcome upon successful completion of this experiment, students will be able to write the equation of. A primary alternation of generations, which characterizes many protozoans, is the alternation of a sexual generation with a generation reproducing by asexual cells agametes. Photosynthetic organisms are found in most of the branches of the eukaryotic tree of life, and these organisms have diverse life cycles. The algaeinabottle experiment provides an engaging and flexible highimpact teaching tool for helping students to know, understand, and apply a number of concepts related to the biology and ecology of aquatic plants and their environments. Research and list the characteristics that affect algae growth. Its the slimy green carpet that blankets the top of ponds or neglected swimming pools. Some of the unifying characteristics of this division include similar photosynthetic pigments that make up the chloroplast, which include chlorophylls a and b, and a, b, and gcarotenes.
How to setup a halimeda aquarium heather spalding, gk12 program setting up a saltwater aquarium for tropical fish requires a lot of time, energy and resources. Algae have been in use as human food for centuries in various parts of the world, including scotland, ireland, norway, sweden, france, germany, north and south america, china, and japan. During cell division, two new valves form in the middle of the cell and partition the. The haploid and diploid life form look very different, they are heteromorph. The main characteristics and definitive features of red, green, brown, and 4 other algea are listed along with great photos and examples. These activities use next generation science standards. This way, there is alternation of two haploid generations gametophyte with one diploid sporophyte generation. Different kinds of algae will need different colour samples. Alternation of generation refers to the specific type of life cycle and includes two distinct phases. Primary school science resources about natures hidden energy store biomara the sustainable fuels from marine biomass project is a research project that aims to demonstrate whether biofuels can be produced from marine biomass algae.
In these groups, a multicellular haploid gametophyte with n chromosomes alternates with a multicellular diploid sporophyte with 2n chromosomes, made up of n pairs. An overview presentation for 10th grade lesson planet. Which of the following phrases characterizes alternation. In most red algae, many green algae, and a few brown algae, the phases are isomorphic and freeliving. Which of the following types of algae shows a distinct. Students will compile possible questions hypotheses about. The first two phases are haploid and the last phase is diploid one.
Researchers have revealed how microalgae produce hydrogen, a clean fuel of the future, and suggest a possible mechanism to jumpstart mass. Disclaimer and safety precautions provides the science fair project ideas for informational purposes only. Alternation of generations in plants and algae springerlink. Steps to photosynthesis for middle school science sciencing. Chrysophytes chrysophytes can only survive in an environment that is low in calcium, which is theyre really common to be found in freshwater hope this helps. The environment algae live in and the environmental factors that influence them most. Algae fuels, feed and more algae biomass organization. Algae are organisms, or living things, that are found all over the world. In foraminifers, for example, the alternating generations consist of sexual and asexual individualsgamonts and. However, there is no regular and fixed alternation of generation, as found in higher palnts. All brown algae are multicellular and all go through an alternation of generation. Middle schoolers participate in an experiment in which they try to stop algae from growing.
In bluegreen algae and certain chlorophyceae which reproduced asexually, there is n alternation generation. Algae singular alga encompass several different groups of living organisms that capture light energy through photosynthesis, converting inorganic substances into simple sugars using the captured. Alternation of generations also known as metagenesis is the type of life cycle that occurs in those plants and algae in the archaeplastida and the heterokontophyta that have distinct haploid sexual and diploid asexual stages. Alternation of generations is a type of life cycle found in terrestrial plants and some algae in which subsequent generations of individuals. Concepts of botany algae pdf 21p this note contains explanation of algae, structure of alage and its classification. These experiments are much advanced than middle school and they are performed with immense precision and skills. Alternation of generations article about alternation of. Though the process can be explained in very simple terms, it is a complex process at the molecular level. The types of algae that shows a distinct alternation of generations is. Identify, examine, and compare the benefits and disadvantages of growing algae in photobioreactors and raceway ponds. Useful notes on the alternation of generations in algae.
How to describe the alternation of generations in algae. Some of them will require more than one class period. The activities range in time from 30 to 50 minutes. It may be long strands of seaweed, sometimes used for fertilizer or food, that sway with the ocean tide. Green algae make up the division chlorophyta, which includes about 7,500 species of eukayotic, unicellular organisms. This is a global problem, but has been observed in long island waterways. Algae are very important because they make much of earths oxygen, which humans and other animals need to breathe. Students determine the effects of oil, detergent, copper crystals sulfate and lawn fertilizer have on the growth of algae.
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