Choose a colour set that matches your algae sample closest and pick it. Middle schoolers participate in an experiment in which they try to stop algae from growing. The activities and lesson plans are designed for elementary school, middle school, and may be adapted for high school students. Its the slimy green carpet that blankets the top of ponds or neglected swimming pools. Photosynthetic organisms are found in most of the branches of the eukaryotic tree of life, and these organisms have diverse life cycles. 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. The haploid phase is gametophyte while the diploid phase is sporophyte. The nutrient levels, salinity, water temperature, light, and number and type of fish in the aquarium must be closely monitored every day. The origin of alternation of generations in land plants. This is a simplest and most primitive type of lifecycle. 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. 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. In most red algae, many green algae, and a few brown algae, the phases are isomorphic and freeliving.
For this science lesson plan, students examine what green algae is and where it grows. In these groups, a multicellular haploid gametophyte with n chromosomes alternates with a multicellular diploid sporophyte with 2n chromosomes, made up of n pairs. During cell division, two new valves form in the middle of the cell and partition the. 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. 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. The specific events that accompany habs vary depending upon the species of algae involved.
Which of the following phrases characterizes alternation. Student learning outcome upon successful completion of this experiment, students will be able to write the equation of. Alternation of generations occurs in almost all marine algae. These activities use next generation science standards. Green algae make up the division chlorophyta, which includes about 7,500 species of eukayotic, unicellular organisms.
Algal bloom experiment page 1 suggested curriculum links grade 8 water systems on earths surface. An overview presentation is suitable for 10th grade. Concepts of botany algae pdf 21p this note contains explanation of algae, structure of alage and its classification. Or, algae may show up as the poisonous red tides that bloom near. Aimed to meet requirements of undergraduate students of botany. The goal is to have the student conduct a controlled experiment to test a hypothesis about.
For example, a singlecelled alga floating near the surface of a lake can divide asexually to. Such lifecycle is known as haplobiontic type of lifecycle. 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. An overview presentation for 10th grade lesson planet. The main characteristics and definitive features of red, green, brown, and 4 other algea are listed along with great photos and examples.
These days algae are a polyphyletic group of organism, carrying out oxygenic. Meiosis and the alternation of generations ucd plant. Which of the following types of algae shows a distinct. Students will compile possible questions hypotheses about. Research and list the characteristics that affect algae growth. Many small algae reproduce asexually by ordinary cell division or by. Students learn that breaking apart algal cell walls enables access to oil, starch, and cell wall sugars. 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. However, there is no regular and fixed alternation of generation, as found in higher palnts. Alternation of generations in plants and algae springerlink. This is a global problem, but has been observed in long island waterways. 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. Salt concentrations of 3%, 6%, 25%, 50% sea water were tested in apbs 20. This way, there is alternation of two haploid generations gametophyte with one diploid sporophyte generation.
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. Algae fuels, feed and more algae biomass organization. How to describe the alternation of generations in algae. Brown algae show an alternation of generations similar to. However, algae are actually neither plants nor animals. Over 10 million scientific documents at your fingertips. Researchers have revealed how microalgae produce hydrogen, a clean fuel of the future, and suggest a possible mechanism to jumpstart mass. In a multiweek experiment, student groups gather data from the photobioreactors that they build to investigate growth conditions that make algae thrive best. This pdf file is licensed for distribution in the form of electronic reprints and by way of. 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. Topics for high school science experiments the topics for high school science fair projects mainly cover the basic disciplines of science, viz, physics, chemistry and biology. The project measures the growth rate of algae supplied with supplemental carbon dioxide. Students determine the effects of oil, detergent, copper crystals sulfate and lawn fertilizer have on the growth of algae. 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.
Algae are very important because they make much of earths oxygen, which humans and other animals need to breathe. Through this lesson, plantsand specifically algaeare presented as an energy solution. In bluegreen algae and certain chlorophyceae which reproduced asexually, there is n alternation generation. How to setup a halimeda aquarium university of hawaii. Alternation of generations article about alternation of. The vegetative algae that is seen in marine habitats is the haploid i. Kelp are an example of a brown alga with a heteromorphic alternation of generations. The types of algae that shows a distinct alternation of generations is. 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. It may be long strands of seaweed, sometimes used for fertilizer or food, that sway with the ocean tide. These experiments are much advanced than middle school and they are performed with immense precision and skills.
All brown algae are multicellular and all go through an alternation of generation. The activities range in time from 30 to 50 minutes. Asexual reproduction occurs in unicellular and multicellular organisms. Diploid sporophytic generation alternating with haploid gametophytic generation. The haploid and diploid life form look very different, they are heteromorph. A primary alternation of generations, which characterizes many protozoans, is the alternation of a sexual generation with a generation reproducing by asexual cells agametes. Steps to photosynthesis for middle school science sciencing. Alternation of generation refers to the specific type of life cycle and includes two distinct phases. Identify, examine, and compare the benefits and disadvantages of growing algae in photobioreactors and raceway ponds. However, the process can be effectively and accurately taught to middle school students, as long as several major components of the process are included. Different kinds of algae will need different colour samples.
Though the process can be explained in very simple terms, it is a complex process at the molecular level. Useful notes on the alternation of generations in algae. Alternation of generations is a type of life cycle found in terrestrial plants and some algae in which subsequent generations of individuals. With help of this pigment brown algae can also utilize yellow and green light for assimilation. The daily bucket green tide, an excess of algae this. Disclaimer and safety precautions provides the science fair project ideas for informational purposes only. Attack of the killer algae super teacher worksheets. Summary life histories of photosynthetic eukaryotes traditionally. The details involved with reproduction styles, and information about traits of each phyla are given. The environment algae live in and the environmental factors that influence them most. Brown algae show an alternation of generations similar to that found in the from bio 106 at nassau community college. 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.
Algae are organisms, or living things, that are found all over the world. The first two phases are haploid and the last phase is diploid one. In foraminifers, for example, the alternating generations consist of sexual and asexual individualsgamonts and. 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. Some species of red algae have a complex triphasic alternation of generations. Some of them will require more than one class period. Photosynthesis is a science topic that is included in many middle school texts.