Free Essay

Bio Lab #6

In: Science

Submitted By francoisep
Words 1095
Pages 5
Survey of the Plant Kingdom
Gymnosperms of Phyla Cycadophyta, Ginkgophyta, Coniferophyta, and Gnetophyta
Exercise 30

Question 1
a). The presence of the flagellated sperm in cycads is surprising, because they do not have true flowers and their seeds are borne naked.. In other gymnosperms and angiosperms, the sperm is transported directly to the female ovule by a sperm tube, and does not have the flagellated sperm.
b). The possession of flagellated sperm has a primitive characteristic in the plant kingdom, because it has characteristics of early ages in the history of mankind.

Question 2
a). Dioecious means having the male and female reproductive organs are borne on separate individual plants.

Question 3
a). The needles are arranged vertically pointed up, outwards, and are stuck close to one another; attached in clusters.
b). In a bundle, there are two leaves in a bundle.
c). Pine leaves have needles, instead of flat leaves, like the broad-leaved trees. The needles help to survive winter’s hardship. For example, the needles cut evaporation so trees can save water, which is very useful during the winter season. Broad leaves trees, produce new leaves every spring. Photosynthesis occurs rapid in broad- leaved trees, unlike the pine leaves.
d). Pines are called evergreens because the tree does not shed its leaves during the fall, they stay green all year around.
e). Pine roots and fir are some plants that we’ve studied in the lab that are evergreen.
f). Function:
• Resin duct: secrets resin to protect pine needle plants from insects and other animals that try and eat it.
• Stoma: tiny openings which allow gas exchange necessary for cellular processes; photosynthesis.
• Epidermis: It protects against water loss, functions in gas exchange; oxygen and carbon dioxide, and helps keep its structure.
• Photosynthetic tissue: Absorbs air (oxygen and carbon dioxide) and water.
• Vascular tissue: Transports water, food and dissolved minerals throughout the plant.
g). The structural features of pine leaves adapt the tree for life in dry environments because the thick bark helps reduce water loss, almost as well as the thin needles. The wide base of roots help it absorb water from the soil.
Question 4
a). No, not all the cones are the same size; there are big small, medium, and big ones.
b). Some of the species grow male cones on the bottom of the pine trees, and some species grow female cones at the top of pine trees; above the male. Pines have pre-pollination barriers; spaced or timed released of pollen.
c). The wings allow the pollen grain to be blown to an ovule, where it germinates.

Question 5
a). Seeds are found in the cone on the upper surfaces of the cone scale.
b). Staminate cones are small. Newly pollinated ovulate cone, range in size from less than one inch to more than two inches in length. Newly pollinated ovulate cone is large in comparison to staminate cones.

Question 6
a). Spores are located underneath the leaves.
b). The male gametophytes of the pine are smaller than the female gametophytes, they are the pollen grains released by male cones to be dispersed to female cones.
c). The female gametophytes, are much larger than the male gametophytes, they remain within the ovules of the female cones of the pine. They depend on the surrounding sporophyte tissues for their nutrition.
d). An ovule is a plant structure that develops into a seed when fertilized.
e). An integument is a tough outer protective layer.
f). Other gymnosperms are similar to pine because gymnosperm examples include non-flowering evergreen trees such as pine; because they do not contain seeds. They both are haploid and their structures are needle-like.
g). They are different because it turns out that many trees that look like pine trees belong to more other gymnosperm families. And many plants that are gymnosperm families are not conifers at all.
h). The evolutionary advantage would be great from not needing free water for fertilization, because plants would not have to rely on water, they would be dependent. If a drought were to happen it would not be a problem for the plants.
Questions for Further Thought and Study
1). Pollination is when pollen or a male gamete reaches, through wind or animals, a female flower. Fertilization is when a male gamete (sperm) and a female gamete (egg) joins together and becomes an embryo.

2). Gymno- means bare or naked. So gymnosperm means a seed that is unprotected; does not have any covering. This term is an appropriate description because each part of the word, gymnosperm, is exactly what it means, translated from Greek to English.

3). Alternate of generation id different in ferns and pines because in ferns there are two generations that takes place. A diploid sporophyte and a haploid gametophyte), the gamete undergoes mitosis in the haploid phase. In pines the dominant generation is the sporophyte, the gametophyte is not really noticeable. The pollen grain relies on air for transportation, while the ovule is dependent on the sporophyte for nutrition.

4). For pines, the wind/ air would be the environmental agent for uniting sperm and egg. For bryophytes, water would be the environmental agent for uniting sperm and egg.

5). In mosses, the gametophyte and the sporophyte are the same size and have the same structures. In ferns, even thought the sporophyte is a microscopic phase, it is really important for ferns. Also they have distinctive individuals. In pines, they are need-like and cone-like trees that are sporophytes. The gametophyte stays in the pine where it was produced.

6). The evolutionary significance of pollen and seeds is that they are able to travel farther distance, by wind, than the parent plants. The pollen and seeds are able to go far, survive, and sexually recombine.

Survey of the Plant Kingdom

Exercise 31

Question 1
I would describe the flower to be very luminous, has oval shapes and straight brown lines imprinted on the petals. The petals are bright pink at the top, and as it goes down the petal, the bright pink color becomes pink, light pink, and then faint pink. It has green sepals, and the stigma is greenish- yellowish.

Question 2
a). There is only one carpel apparent.
b). There is one ovule in each locule.

Question 3
a). Dehiscent anther is the final function of the anther, which releases the pollen grains. Predehiscent anther is when tepals open and stamens extend.
b). When the mature ovule becomes a seed, is the stage that is most mature.

Question 4
a). There

Similar Documents

Free Essay

Lab 6 Bios 105

...Digestive and Respiratory System Worksheet Name: Before answering the questions below, log in to ADAM and view the clinical animations for Peristalsis and Gas Exchange. Remember, you may use our text, our discussions, and the internet to write your answers, but be sure to write your answers in your own words and to use correct citations where appropriate! Cutting and Pasting your responses will result in a Zero for this assignment! 1. Trace the path of an oxygen molecule from the air outside you to your tissues. Nose --> Mouth --> Pharynx --> Larynx --> Trachea --> (LUNGS: Bronchus --> Bronchioles --> Alveoli), then back out. Air enters the body through the nose and then moves into spaces called the nasal cavities. (Hair and cilia trap dust and debris and Air is warmed and moistened) Some of the cells lining the nasal cavities produce mucus. This sticky material moistens the air and keeps the lining from drying out. Mucus also traps particles such as dust. The cells that line the nasal cavities have cilia, tiny hair like extensions that can move together in a sweeping motion. Next, air enters the pharynx. The pharynx opens to two different passages. One is connected to the esophagus, wherein food and fluids are directed and the other is linked to the trachea where the air is passed through to the lungs. From the pharynx, air enters into the larynx (the voice box). The larynx is part of the upper respiratory tract that has two main functions: a......

Words: 915 - Pages: 4

Premium Essay


...BIO 182 LAB SIGN OFF PAGE — LESSON 13 Name _______________________________ Please staple all of your lab pages for this Lesson together with this page as the top. You will use this page to get your Labs for Lesson 13 signed off by the Biology Learning Center staff. You need to have all of the following steps initialed by a staff member before you can receive your 15 labs points for Lesson 13 and be allowed to take Exam 7. After you have obtained all of your sign offs for this Lesson, be sure that a BLC staff member indicates on your Lab Card that you have completed all the Labs. Also, keep this sign off page, along with your completed lab worksheets, as proof of your lab completion If your Lab Card indicates that you have not completed the required Labs for this Lesson and you believe that you have, it is up to you to provide proof that you have indeed completed the Labs. Keep this page! __________ Lesson 13, Step 3A: Ecobeaker: Isle Royale (in BLC) Lesson 13, Step 3B: Ecobeaker: Isle Royale (in BLC) Lesson 13, Step 3C: Ecobeaker: Isle Royale (in BLC) Lesson 13, Step 3D: Ecobeaker: Isle Royale (in BLC) Lesson 13, Step 4A: Ecobeaker: Intermediate Disturbance Hypothesis (in BLC) Lesson 13, Step 4B: Ecobeaker: Intermediate Disturbance Hypothesis (in BLC) Lesson 13, Step 4C: Ecobeaker: Intermediate Disturbance Hypothesis (in BLC) __________ __________ __________ __________ __________ __________ *BLC Staff: After the student receives his/her last initial on......

Words: 3068 - Pages: 13

Premium Essay

Bio 156 Lab 2

...4/15/2015 BIO156 ­ Lab 2 Print Lab 2 Biological Molecules and pH Introduction: Connecting Your Learning Biological organisms, like all things, are made up of elements. These elements combine to form organic molecules that create the basis for life. The main elements found in biological organisms include carbon (C), hydrogen (H), phosphorus (P), nitrogen (N), and oxygen (O). This lab describes how these elements form some of the most important molecules in life: carbohydrates, proteins, and fats. Resources and Assignments Multimedia Resources Required Assignments None Lesson 2 Lab 2 From the Lab Kit 7 test tubes Benedict's solution Biuret solution 15 micropipettes 10 pipettes Forceps pH test strips 4 unknown samples 1/21 4/15/2015 BIO156 ­ Lab 2 Measuring spoons (teaspoon and tablespoon) 50 mL beaker Mortar and pestle Glass stirring rod 100 mL graduated cylinder Microscope slide Plastic funnel Test tube tongs Test tube rack 5 plastic cups Goggles Plastic gloves 1 tablespoon baking soda 1 tablespoon chicken soup 4 tablespoons sugar Required Materials 1 tablespoon cornstarch 2 tablespoons unflavored gelatin Student Provided Small saucepan Paper towel Oven glove or mitt Baking tray or aluminum foil (about an 18-inch sheet) Scissors Pencil Dime Microwave (optional) or Stove Permanent......

Words: 3270 - Pages: 14

Premium Essay

Facebook Psycological Effects

...Highland Parkway, Downers Grove, IL 60515 | 888.556.8226 | Please visit for location specific address, phone and fax information. BACHELOR OF SCIENCE IN NURSING DEGREE CURRICULUM SAMPLE 3-YEAR CURRICULUM PLAN FOR STUDENTS ENROLLED PRIOR TO JANUARY 2016 YEAR 1 Session I Session II SEMESTER 1 SEMESTER 2 BIOS-251*: Anatomy & Physiology I with Lab MATH-114*: Algebra for College Students NR-101: Transitions in Nursing (T=1) Credits 2 4 1 BIOS-252*: Anatomy & Physiology II with Lab SOCS-185*: Culture & Society ENGL-117*: English Composition 2 3 3 Semester Hours: 15 Credits (LAS=14, NR=1) BIOS-255*: Anatomy & Physiology III with Lab ENGL-147*: Advanced English Composition PSYC-110*: Psychology BIOS-256*: Anatomy & Physiology IV with Lab SPCH-275*: Public Speaking or SPCH-277*: Interpersonal Communication PSYC-290* †: Lifespan Development SEM ESTER 3 Credits 2 3 3 2 3 NR-222: Health & Wellness (T=3) CHEM-120*: Intro to General, Organic &  Biological Chemistry with Lab BIOS-242*: Fundamentals of Microbiology with Lab PHIL-347*: Critical Reasoning or PHIL-447*: Logic & Critical Thinking Credits 3 4 4 3 3 Semester Hours: 16 Credits (LAS=16, NR=0) Semester Hours: 14 Credits (LAS=11, NR=3) Total Credit Hours: 45 YEAR 2 Session I Session II SEMESTER 1 NR-224: Fundamentals – Skills (T=2, L=1) NR-302: Health Assessment I (T=1.5, L=0.5) NR-281:......

Words: 723 - Pages: 3

Free Essay


...Sullivan Phone: 334-4974 (office) Email: Office Hours: TBD For whom intended: Bio 111 is the first of a two-semester series of general biology courses for science majors. IF YOU HAVE BEEN ADMITTED TO THE SCHOOL OF NURSING, YOU SHOULD NOT BE IN THIS COURSE!!! If you are considered “prehealth,” instead, then this is where you should be. This course satisfies one of the natural science courses (GNS) necessary for the completion of the General Education Curriculum (GEC) requirements. However, this course is not intended for non-science majors. Major Concepts in Biology (Bio 105), which may be taken with a laboratory component (Bio 105L), is also a GEC Natural Science course and is designed for students who are not majoring in the sciences. NOTE: YOU MUST BE REGISTERED FOR BIOLOGY 111 LABORATORY (BIO 111L) Required Items: • Text: Principles of Life, Hillis et al; 2012; first edition; you also need online access to BioPortal • Lab Manual: Principles of Biology I – A laboratory manual for students in BIO 111, 2013-2014 edition; (Lab coordinator is Mr. Joseph Bundy, Sullivan 304. Only he can help you recycle a previous lab grade, although you are welcome to ask me questions before seeing Mr. Bundy.) • Answer Sheets: All tests will be optically scanned multiple choice; YOU must provide your own 200-item answer sheets (Scantron Sheets Standard Form NA3100-6) and several #2 pencils and erasers. These can be purchased at the bookstore. They......

Words: 2209 - Pages: 9

Premium Essay

Chamberland Please visit for location specific address, phone and fax information. BACHELOR OF SCIENCE IN NURSING DEGREE CURRICULUM SAMPLE 3-YEAR CURRICULUM PLAN EFFECTIVE JULY 2014 YEAR 1 Session I Session II S E ME S T E R 1 BIOS-251*: Anatomy & Physiology I with Lab MATH-114*: Algebra for College Students NR-101: Transitions in Nursing (T=1) BIOS-252*: Anatomy & Physiology II with Lab SOCS-185*: Culture & Society or SOCS-325*: Environmental Sociology ENGL-117*: English Composition SEMESTER 2 Credits 2 4 1 2 3 3 BIOS-255*: Anatomy & Physiology III with Lab ENGL-147*: Advanced English Composition PSYC-110*: Psychology BIOS-256*: Anatomy & Physiology IV with Lab SPCH-275*: Public Speaking or SPCH-277*: Interpersonal Communication PSYC-285*: Developmental Psychology or PSYC-290* †: Lifespan Development SEM ESTER 3 Credits 2 3 3 2 3 BIOS-242*: Fundamentals of Microbiology with Lab PHIL-447*: Logic & Critical Thinking Credits 3 4 4 3 3 Semester Hours: 16 Credits (LAS=16, NR=0) Semester Hours: 15 Credits (LAS=14, NR=1) NR-222: Health & Wellness (T=3) CHEM-120*:  ntro to General, Organic & I Biological Chemistry with Lab Semester Hours: 14 Credits (LAS=11, NR=3) Total Credit Hours: 45 YEAR 2 Session I Session II S E ME S T E R 1 NR-224: Fundamentals – Skills (T=2, L=1) NR-302: Health Assessment I (T=1.5, L=0.5) NR-281: Pathophysiology I (T=2) NR-226:......

Words: 720 - Pages: 3

Free Essay


...least 1 course from each box, 7-9 total credit hours 2 different course codes, at least 1 with a lab Life Sciences (3-4 credit hours) BIO 100* Biological Sciences for Educators (lab) BIO 101 Biology in Your World BIO 111* Understanding Bio Sys Through Inq. (lab only) BIO 121* General Biology I (lab) BMS 100 Concepts & Issues in the Life Sciences BMS 105 Concepts & Lab in the Life Sciences (lab) BMS 110* Intro to Biomedical Sciences (lab) BMS 111* Intro to Lab in Biomedical Sci (lab only) GLG 115 Life of the Past Physical Sciences (3-5 credit hours) AST 113 Modern Astronomy AST 114 Survey of Astronomy AST 115 Basic Astronomy (lab) CHM 107 Chemistry for the Citizen CHM 108* Chemistry for the Citizen Lab CHM 116* Fundamentals of Chemistry CHM 117* Fundamentals of Chemistry Lab GLG 110 Principles of Geology (lab) GLG 171 Environmental Geology GRY 135 Principles of Weather & Climate (lab) GRY 142 Introductory Physical Geography (lab) PHY 100 Survey of Physics (lab) PHY 101* Physics by Inquiry for Educators (lab) PHY 123* Introduction to Physics I (lab) PHY 203* Foundations of Physics I (lab) 4(3-3) 3(3-0) 1(0-2) 4(3-3) 4(4-0) 4(3-2) 4(3-2) 1(0-2) 3(3-0) 3(3-0) 4(4-0) 4(3-2) 3(3-0) 1(0-2) 4(4-0) 1(0-2) 4(3-2) 3(3-0) 4(3-2) 4(3-2) 4(3-2) 4(2-6) 4(3-2) 5(4-2) GEC 107 (no lab) GEC 106 (lab) HUMAN CULTURES 4 different course codes from these boxes Social & Behavioral Sciences (choose two, 6 credit hours) AGR 100 Food Security 3 ANT 125 Exploring Our Human Ancestry 3 CFD 155......

Words: 999 - Pages: 4

Free Essay

Yeast Culture Lab

...Yeast Culture Lab BIO/315 April 22, 2014 Annissa Furr Yeast Lab Yeast, is a microscopic one celled organism that belongs to the group of organisms that is called fungi. They are single celled organisms that have a scientific name of Saccharomyces cerevisiae. Yeast can have many purposes but the main purpose of yeast is to help the fermentation process. Yeast is a living organism known as a fungus and it gets its energy source from sugar. Yeast can also be used in creating certain medical intentions that heal wounds and reduce inflammation because of the large amount of hormones and enzymes. In reference to yeast reproduction depends on the type of species because they can be either asexual by mitosis or sexual by budding. Consumption talked about the use and rate of use of a primary consumer that needs photosynthesis in order to create energy from CO2. Death is in reference to a population and refers to the toll of death in a population. Hypothesis This labs main objective is to test cultures referring to yeast. The hypothesis is that the yeast will grow in all the environments that it is placed in but it will thrive in the environment that has sugar that is because yeast uses sugar as an energy sources naturally which will make the yeast generate more. The yeast could be identical in all the environments but most likely the situation will be that the yeast grows rapidly in the sugar. This hypothesis needs to be tested and in order to do that their...

Words: 1280 - Pages: 6

Free Essay


...Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support. Why (a) do you suppose Union Planters purchases investments, rather than simply making loans? Why does it purchase investments that vary in nature both in terms of their maturities and in type (debt versus stock)? 1. They may have excess funds that they havent loaned out yet and instead of having the money just sit there the bank manager may decide that it could earn more revenue by choosing to invest. 2. Depending on the situation the bank manager may also feel that they can make more money by investing the excess funds rather than lending the money out. For example right now interest rates are at an all-time low and they may feel like the return on the interest is not enough compared to investing. 3. The bank manager may feel that these investments will mature and be worth more in the future so they may choose to hold long term to create more revenue. (b) How must Union Planters account for its investments in each of the two categories? 1. Trading securities Balance sheet at fair market value a. Gain/Loss reported as part of income 2. Available-for-Sale Balance sheet at fair market value a. Gain/Loss Comprehensive income/ separate from Stockholders equity until realized 3. Held to-Maturity reported at amortized cost Planters had none (c) In what ways does classifying into......

Words: 3165 - Pages: 13

Premium Essay


...TRANSFER OPTIONS ▪ REAL STUDENTS. REAL STORIES. [pic] Nursing - Associate's Degree REQUIRED COURSES AND RECOMMENDED SEQUENCE: The following is a recommended sequence of courses for completing this program. Developmental and prerequisite course requirements, credit load, and/or course availability may affect a student's individual progress. Students should consult their online program evaluation or an academic advisor for individual program planning. |Course # / Elective |Course Title / Elective Information |Credits | |PRE-CLINICAL | |BIO-2070* |Introduction to Human Anatomy and Physiology (lecture and lab) |4 | |ENG-1010* |Composition and Rhetoric |3 | |HTH-1030+ |Current Issues of the Older Adult |1 | |NUR-1015*+ |Introduction to Nursing |1 | |Mathematics Acceptable: |See Gen Ed Listing |3 | |CLINICAL SEMESTER ONE...

Words: 556 - Pages: 3

Premium Essay


... 2. Zanele Simon ID#2013060103 All added 3. Bethel Kaseram ID# All added 4. Shenelle Harper ID#2013080232 all added 5. Stacey Mahabal ID#2013060004 all added 6. Chanel Paramsook ID#2013070004 Health Promotion NURS102 7. Carlene Nancoo ID#2013060080 College Algebra MATH 165 Anatomy & Physiology BIOL112 8. Anastasia Stephen-Kadil ID#2013060076 All added 9. Aleshia Khan-Roach ID# 2013060104 College Algebra MATH 165 Principles of Sociology SOCI119 10. Dalia Semper ID# 2013060087 College Algebra MATH 165 Principles of Sociology SOCI119 Health Promotion NURS102 Introduction to Bio Chemistry BCHM 120-Lab 2 11. Grace Pria Rose ID#2013040055 Introduction to Bio Chemistry BCHM 120-Lab 2 12. Dorcas Laing ID# 2013060025 Introduction to Bio Chemistry BCHM 120-Lab 2 Anatomy & Physiology BIOL112 College Algebra MATH 165 13. Kedeisha Pope ID#20130050019 Introduction to Bio Chemistry BCHM 120-Lab 2 College Algebra MATH 165 Principles of Sociology SOCI119 14. Avalon Gustave ID#2013060072 Health Promotion NURS102 College Algebra MATH 165 Principles of Sociology SOCI119 15. Sheneice DuFont ID#2013070105 Health Promotion NURS102 College Algebra MATH 165 (not doing bio) 16. Adeola Ogunsheye General Education Students Shadrach Gill 2013090149 Introduction to Psychology Recia Dyette 2014010031 History Psychology Kirl Mc......

Words: 315 - Pages: 2

Premium Essay


...The Agilent Advantage Agilent Technologies The World’s Premier Measurement Company When measurement matters, engineers, scientists, researchers, manufacturers, businesses, universities, and government agencies rely on Agilent Technologies’ tools and solutions. From home entertainment to homeland security, from food safety to network reliability, and from communicating wirelessly to discovering the genetic basis of disease, Agilent Technologies provides the measurement capabilities that make our world more productive and a safer, healthier, more enjoyable place to live. Agilent Technologies operates two primary businesses — (1) electronic measurement (EMG) and (2) life sciences and chemical analysis (LSCA) — supported by a central research group, Agilent Laboratories. Our businesses excel in applying measurement technologies to develop products that sense, analyze, display, and communicate data. Agilent Technologies’ 19,000 employees serve customers in more than 110 countries. These customers include many of the world’s leading high-technology firms, which rely on our products and services to increase profitability and competitiveness, from research and development through manufacturing, installation, and maintenance. We enable our customers to speed their time to market and achieve volume production and high-quality precision manufacturing. In fiscal year 2006, Agilent Technologies had net revenue of $5 billion. More than half of this revenue was generated from outside...

Words: 2239 - Pages: 9

Free Essay


... ENGL 1020 Crit Thinking and Argument Take one of the following (one of these must be taken and will count as the speech req, but not an Oral Intensive. If an additional one is taken it will count as Oral Intensive): SPCH 1300 General Speech SPCH 2300 Public Speaking SPCH 2320 Arg & Debate (meets A&S req) History (6 cr.) Done: HIST 2010 The United States to 1877 HIST 2020 The United States Since 1877 Using Information Technology (3 cr.) Done: CSCI 1100 or pass exam (schedule exam at: Science (8 cr.) Done: A sequence of 2 courses in the same field is required by A&S (e.g., biology). Psychology requires at least one biology course. Students can take two biology courses or two other lab courses and one biology. Take two of these BIOL or two other lab sciences in the same discipline and one of these BIOL: BIOL 1010-1011 Biology for Non-majors I BIOL 1020-1021 Biology for Non-majors I BIOL 1110-1111 Bio for majors I BIOL 1120-1121 Bio for majors II BIOL 1130-31 Bio for majors III Other lab science: Other lab science: Literature (3 cr.) Done: Take one of the following: ENGL 2030 Literary Heritage ENGL 2110 American Literature I ENGL 2120 American Literature II ENGL 2210 British Literature I (W) ENGL 2220 British Literature II (W) ENGL 2330 World Literature ENGL 2430 European Literature......

Words: 773 - Pages: 4

Free Essay


...environments as sulfur hot-springs associated with volcanic activity to super-cooled waters of the Antarctic. This lab will consist of two parts. Each part will involve discussion and set-up during the first week and the reading of the results on the second week of the lab. Part 1 Bacteria in our environment You will identify some parts of your local environment you wish to test for the presence of bacteria. Part 2 Effectiveness of hand washing You will be conducting an experiment to test the effectiveness of various hand-washing methods and their effects on bacteria. MATERIALS & METHODS Part 1: Bacteria in our environment. Work in groups of two. Week 1 1. Decide what parts of your local environment you wish to sample for bacteria. 2. Obtain a sterile TSA (Trypticase soy agar) plate. Keep it sterile, do not open yet! 3. Label the bottom of the plate with the following: - students initials or names - type of exposure - date of exposure 4. Expose the plate. Do not open the plate longer than is necessary for your exposure. 5. Cover and turn upside down. Place on the tray provided for your class. 6. Let sit at room temperature until the next lab period. (The lab tech will check the condition of the cultures periodically. If growth is too rapid, the plates will be placed in a......

Words: 718 - Pages: 3

Premium Essay

Yeast Culture Lab

...Yeast Culture Lab Introduction Yeast is a one-celled, microscopic organism, which is part of the fungi kingdom. Yeasts do not make up a single group (Smith & Smith, 2012). Yeasts use organic material as a means of making energy, which make them chemoorganotrophs (Smith & Smith, 2012). Carbon is procured primarily from hexose sugars, such as fructose and glucose. Yeast need either oxygen for aerobic cellular respiration or for species that are anaerobic, but also have aerobic methods creating energy (Smith & Smith, 2012). There are no species of yeast species that are known to grow only anaerobically. Yeasts thrive in an environment with a slightly acidic (Smith & Smith, 2012). The reproductive cycle of yeasts can be either asexual or sexual depending on the species. The most widely seen method of growth in yeast is asexual reproduction referred to as budding (Smith & Smith, 2012). Reproduction in reference to yeast depends on the species; the species can be both asexual by mitosis and sexual by budding (Smith & Smith, 2012). Consumption refers to use and the rate of use of something such as how a consumer, such as a primary consumer like a tree would use photosynthesis to make energy from carbon dioxide. Death in reference to a population is referring to the rate of death in that population (Smith & Smith, 2012). Hypothesis The primary goal of the yeast culture lab is to test a theory involving samples of yeast cultures......

Words: 1353 - Pages: 6