Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

Pine needle cross section labeled

16/03/2021 Client: saad24vbs Deadline: 2 Day

Lab 5: Seed-bearing Plants


Materials needed
Sharp knife
Cutting board
Large pine cone with open “scales”
Fascicle (bundle) of pine needles
2 household cups (may be disposable)
Measuring cup
Red food coloring
Blue food coloring
Salt
Celery stalk
Pea pod: sugar snap pea or snow pea
Dry lima beans (3)
Activity: anatomy of pine
1. Obtain a pine cone and a fascicle (bundle) of pine needles. Refer to Figure 5.1 as you perform this activity.
2. Examine the fascicle of pine needles (Figure 5.1). A pine needle is actually a leaf. It has green pigmentation for photosynthesis. It is skinny, leathery, and coated with a sticky resin to help retain water. Pine needles are bound together in a bundle (fascicle). Different species have different numbers of needles per fascicle. For example, white pines (Pinus strobus) have five needles per fascicle, while red pines (Pinus resinosa) have two needles per fascicle.
3. Examine the large pine cone (Figure 5.1). It should be large enough to fit into your palm, andits woody “scales” should be open. Pine trees produce two kinds of cones: pollen cones and seed cones (or ovulate cones). Pollen cones are small – they often are not much bigger than the last digit of your pinky finger. These cones produce pollen grains, which contain sperm. You should have a larger cone, the seed cone. Each woody “scale” of the seed cone typically produces two eggs at its base. Before the eggs are fertilized, the seed cone is closed up. Pollen grains blow into the cracks between the closed scales, and fertilize the eggs. The fertilized egg then develops into a seed, and the scale opens. The scales are called sporophylls (“spore” + “leaf”).
4. Break off a few scales near the top of the cone. Examine the base. You should see two indentations where the seeds used to be. Examine or break off a few scales near the bottom of the cone. There may be seeds present (Figure 5.1). The pine seed has a “wing.” This enables the seed to disperse away from the parent plant via the wind. This is why the scales open up once the seed develops.
5. A seed cone usually does not release all of its seeds at once. Thus, part of the cone, usually the top, is often more “open” than other parts. Because pine cones rely on the wind to disperse seeds, it is important that the “wing” of the seed stays dry. Pine cones protect developing seeds from becoming waterlogged through a passive reaction.
a. Place your open seed cone into a cup of tap water.
b. Record: Time into water _________
Describe your observations and any changes in the cone appearance
c. Let the cone sit in the water for at least 30 minutes.
d. Record: Time out of water _______
Describe your observations and any changes in the cone appearance
Fig 5.1
Lab Report
This is an experimental variation on the celery food dye activity of Lab 5.
Activity
1. Obtain four cups (two of which could have been used in Lab 5). As in Lab 5, fill each cup with 400 ml of tap water. Use red dye to darkly stain two cups, and use blue dye to darkly stain the other two cups. Be sure that each red cup gets the same amount of dye and that each blue cup gets the same amount of dye. Record the drops in each. Add a spoonful of salt into each cup.
2. Label one red dye cup and one blue dye cup with an S (high salt). Add 4 spoonfuls of salt to each of these cups. Stir the solutions thoroughly.
3. Obtain two similar stalks of celery, each with some leaves at the top. Cut a 1-cm piece (about one-half inch) off the bottom of each stalk. Keep the relative lengths of the two stalks as similar as possible.15
4. Carefully, split the stalks up the middle about half-way. The stalks should each now have two “legs.” Be sure that the legs of each stock are similar sized (i.e., the left leg and right leg are the nearly the same length and width).
5. Place the red S cup and the blue S cup together. Gently place one “leg” of one stalk into the red S cup, and the other “leg” of the stock into the blue S cup. The celery should now be “straddling” the two S cups (Figure 5.2.B). Place the red non-S cup and blue non-S cup together and situate the legs of the other celery stalk into each cup (i.e., the celery "straddles" these two non-S cups).
6. Record the time at which you place each celery into the pairs of cups as "Start time."
Start time
Stop time
a. S cups (high salt)
b.Non-S cups (low salt)
7. Let the celery sit in the cups for 6 hours, or until you can see color in the leaves of one of the stalks. In Step 6 above, record the time when you remove the stalks as "Stop time."
8. Examine the top of the celery stalks. Are there differences between the celery in the high salt (S) and low salt (non-S) water conditions? Record your observations in Question 1 of Lab Report 6.
9. Remove the celery from the cups (be sure to keep it clear which came from the high salt solution (S) and which came from the low salt (non-S) condition). Lay each stalk out flat. Starting at the top, move down the stalk, making cross-sectional cuts. Stop when you first see evidence of dye. Measure how far up each stalk the red and blue dyes climbed. In Table 6.1 in Lab Report 6, record the distance (cm) traveled by the red dye in high salt conditions (S), the blue dye in high salt conditions (S), the red dye in low salt conditions (non-S) and the blue dye in low salt conditions (non-S).
10. Tear apart the celery stalk. Notice the feel of the vascular tissue, and how the food coloring lies within it.
Lab 6A: Water transport and salinity
1. Examine the top of the celery stalks. Are there differences between the celery in the high salt and low salt water conditions? Describe your observations.
2. Record the distance (cm) traveled by the red dye in high salt conditions (S), the blue dye in high salt conditions (S), the red dye in low salt conditions (non-S) and the blue dye in low salt conditions (non-S).
Table 6.1
Distance (cm)
Red dye (S)
Blue dye (S)
Red dye (non-S)
Blue dye (non-S)
3. From Question 2 above, did the dyes travel at the same rate? What can you conclude about the effect of salinity on water transport in celery from this experiment? Propose a biological or physical explanation for your conclusion.
Activity: seeds
1. Obtain a sugar snap pea pod, or a snow pea pod. This is the fruit that develops from the pea flower (Figure 5.4). In this case, the fruit is not as sweet or as juicy as an apple. Cut along the curve of the pod. This exposes the seeds (peas) on the inside. You should be able to crack the peas in half. This reveals that the seed is composed of two cotyledons (seed “leaves”). The cotyledon becomes the main food source as the seed starts sprouting.
2. Angiosperm plants are divided into dicots (Class Dicotyledonae) and monocots (ClassMonocotyledonae). There are 180,000 species of dicots, including many flowers, shrubs,and trees. Dicots are distinguished by seeds with two cotyledons (e.g., bean, peanut, pea),leaves with veins having a branching pattern (e.g., maple, oak), and flower parts in multiples of four or five (e.g., four petals of poppies, five petals of wild roses). There are 80,000 species of monocots, including grasses and important crops (e.g., wheat, corn, rice), palms, and orchids. Monocot seeds have one cotyledon (e.g., corn kernel), leaves with parallel veins (e.g., blade of grass), and flower parts in multiples of three (e.g., six petals on lilies).
3. Obtain a few dry lima beans. Soak them in a cup of tap water for at least 8 hours.
4. Gently dry the beans on a paper towel. With your finger, you should be able to gently peel off the outer seed coat (if you cannot, soak the bean for 1-2 more hours).
5. Using a knife, carefully cut along the curvature of the bean. You should then be able to break the bean in half. Each half is a cotyledon, which has become swollen with nutrients from the endosperm.


























































Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Writer Writer Name Offer Chat

Writers are writing their proposals. Just wait here to get the offers for your project...

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Finance manager personal statement - Focused cough assessment shadow health - Braveheart freedom speech analysis - Credit card size in pixels photoshop - C228 task 2 epidemiological determinants - What is a random assignment in psychology - Qué quiere paola vhl - Valley of the gods hawaii - Financial technician job description - Faria depth gauge alarm - Glaxy exchange company karachi - Clark rubber sanit eezy - Oecologia abbreviation - How to get textbook answers for free - observe a public place then write two paragraphs, one a positive description, one a negative - Branded jewellery market in india - Macbeth in act 2 - Aps 4 work level standards - D6 - Planning the Project - How language shapes the way we think transcript - Bae automated systems case study analysis - Colonial adventure tours case answers chapter - Life is like a walking shadow - Youtube hinge and bracket dear ladies - Module 2.3 quiz answers drug and alcohol drive safely - Portifolio - Iom reports 2010 future nursing leading change advancing health - Coddling of the american mind rebuttal - What censurers read crossword clue - When mr pirzada came to dine character analysis - Brandon holthaus net worth - Stsl component tax 2021 - Marx supply uses a sales journal - Why did the british journalist henry fairley call kennedy's activism "the politics of expectation"? - Ethics/Euthanasia - Your hand your tongue macbeth - Creativity and innovation in organizations ppt - Introduction to problem solving and algorithm design - David low cartoon archive - Maple flock co ltd v universal furniture products - How to measure calcium content in milk - A Case Analysis of Uber - The times 100 business case studies aldi - Erm adoption and implementation in the higher education environment - Medium voltage fuse sizes - Murdoch chicago referencing - Analysis of spotty handed villainesses - Mini-Project #1: - Story in 6 words - Hilton hotels customizes rooms and lobbies according to location - C 130 technical manuals - We need more humanities majors summary - MIPS project 2 - Chapter 10 e commerce digital markets digital goods quiz - The true story of the three little pigs printable - Cardinia shire council address - Caloric content of food labpaq answers - Book camping wilsons prom - Telecommunications and Networking Discussion questions - Best vi cheat sheet - Institute of residential property management - F7 - What do sea cadets do - 367 - Trompenaars cultural dimensions country scores - Trolex india pvt ltd - Croajingolong national park walks - La trobe harvard referencing - Mother teresa myer briggs - Forrest gump movie review essay - A sprinter accelerates from rest to - The Dissertation Research Prospectus - The right thing to do james rachels - Qbe seaboard insurance philippines inc - Competency Modeling ands KSA's - due in 18 hours - Midas and morgan and maecenas - All shook up glenn c altschuler - The globalization of world politics third edition - St catherine university nursing - MARKET STRUCTURE AND GAME THEORY- SLP - Which of the following calculations multiplies 23 by 0.01 - Animal farm battle of the cowshed - What is a sentinel value in java - Unit 7 discussion - Activity 1 bony landmark analysis answers - International Distribution Channels - Cyber Security - Intel centrino wireless n wimax 6150 - The task of an organization is reflected in its - Ethos pathos logos kairos - Graphic organizer for homework - Beaufort scale wave height - Fusion io iodrive2 365gb - Newspaper article with poor reasoning - Pragati resorts amrutha aharam package cost - Blood raw louie bag instrumental - 6 essay type questions - Brief history of children's literature - Operations and Quality Management