Double Fertilization

Angiosperms (flowering plants) undergo double fertilization. Click the picture below to be taken to the animation for the notes you took in class today. Click on the "animation" tab at the top. You may view it step-by-step or as a video. There is also narration available. You should review pages 634-635 in the book to complete the remaining two figures in the packet.

Review Quiz on Chapters 10-12

"Last night as I was studying for this quiz, I realized this is the earliest I've ever started studying for a final exam." ~ Student in A block.

That's right, that's EXACTLY what these quizzes are for. By the time the science division review session roles around (Monday evening June 1st) you really shouldn't have too many questions left.

Tomorrow you will have a review quiz on evolution (chapters 13-15)

Review Quizzes

The week of May 25th you will have a series of review quizzes. These quizzes WILL count towards your term grade, so make sure you study!

Monday: Quiz on Chapters 10, 11 (selected sections) and 12
Tuesday: Quiz on Chapters 13, 14, and 15
Wednesday/Thursday: Quiz on Chapters 20, 21, 23, and general aspects of reproduction
Friday: 20 minute block classes, any last questions.

Think Before You Print!

The packets for chapters 10, 11, part of 13, 14, 15, 20 and 23 are on blackboard. Please THINK before you print.

• In 2004 the United States used 8 million tons of office paper (3.2 billion reams). That’s the equivalent of 178 million trees!⁵
• The U.S. is by far the world’s largest producer and consumer of paper. Per capita U.S. paper consumption is over six times greater than the world average.⁶
• In the United States, we use enough office paper each year to build a 10-foot-high wall that’s 6,815 miles long. That’s more than the distance from New York to Tokyo!⁷
• ^{Need more guilt? Check out PrintGreener}

Chapter 31 wrap up and review

Today we are wrapping up chapter 31 and did some review on chapter 10 (DNA replication, transcription and translation). Tomorrow will be the optional quiz/test. IF YOU ARE GOING TO TAKE IT, YOU NEED TO TELL ME TODAY IN CLASS AND YOU WILL BE HELD ACCOUNTABLE FOR THIS ASSESSMENT.

So What's on the Final Exam?

Your test is on information from the following chapters.

There will be 60 multiple choice questions (1 point each) and 4 essays (10 points each).

Chapter 10 - DNA, transcription, translation, etc,

Chapter 11.1-11.6 and 11.15-11.6 - Gene regulation & oncogenes,trp operon, lac operon

Chapter 12 - DNA technology (we did this mostly through lab)
gel electrophoresis,
PCR,
cloning,
plasmids,
PGLO

Chapter 13 - Evolution with Populations (mechanisms of microevolution)

Chapter 14 - Origin of Species (speciation)

Chapter 15 - Macroevolution...sort of, more on Phylogenies & Systemics

Chapter 20 - Gross anatomy, structure & function, homeostasis

Chapter 21 - Digestion

Chapter 23 - Circulation

Chapter 27 - Basics of Human Reproduction female and male

Chapter 31 - Flower anatomy and Plant anatomy

There are also sections in the right sidebar for
Plants & plant anatomy
Human anatomy
Evolution
DNA Replication, Transcription & Translation
DNA technology

Live a longer life

This just in:

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Live longer and learn some geography, where's Ikaria? It's a Greek island, check out the map below.

Thanks to Beth S. and Maria D. for this information.

Chapter 31 Packet

You will be working on these questions and vocab in class this week. On Tuesday May 19th you will have a test on this Chapter 31 content. This will be your last regular test of the year!

Vocabulary for Chapter 31

monocots * petiole * meristem * endodermis * dicots * lateral roots * root system *

parenchyma cell * primary growth * shoot system * collenchyma cell * secondary growth *

vascular bundle * xylem * sclerenchyma cell * stomata * phloem * guard cells * taproot

root cap * transpiration * fibrous root * mesophyll * root hairs * stem * node * xylem * pith

vascular cambium * cork cambium * leaves * ground meristem * axillary bud * zone of elongation

periderm * terminal bud * zone of maturation * bark * epidermis * annuals * perennials

This time, YOU are going to make your own chapter 31 packet by answer the questions below and adding pictures. When you are done you will have a fabulous study guide. If you use sources from the web, you need to include the URL. For the sake of space, you do not need to cite pictures.

1. List the characteristics of an angiosperm.

2. Explain the differences between monocots and dicots.

3. Describe the importance of root systems and shoot systems to plants and explain how they work together. Include a picture.

4. Explain how taproot systems and fibrous root systems differ.

5. How are tubers and rhizomes related?

6. Distinguish between parenchyma and collenchyma cells with regards to structure and function. Include pictures for each type of cell.

7. Explain the importance of tracheids and vessel elements to plants

8. Distinguish between water-conducting cells and sieve-tube members with regards to structure and function.

9. Describe the functions of the dermal tissue system, vascular tissue system and ground tissue system.

10. Distinguish among annual, biennial, and perennial plants. Give an example for each type of plant.

11. Explain the importance of the zones of cell division, cell elongation, and cell differentiation in primary growth of roots.

12. Explain the importance of the endodermis to a plant.

13. Describe how "wood" forms due to secondary growth of stems.

14. Using a diagram, describe the basic structure of a root, a stem, and a leaf.

**These questions were adapted from Mrs. Cornell's Biology class.

Test Today

Today students took a test on the digestive system. There is no homework for tonight.

Happy Mother's Day!

Call your mom and wish her a Happy Mother's Day!

Chapter 21 (Digestion) Test Breakdown

Here it is folks, what you've been waiting for...

22 Multiple Choice (2 points each)

1 True false (2 points)

Short answer questions worth 26 points total

1 open response worth 25 points

1 "create your own question" worth 3 points.

Jeopardy Review

The Jeopardy PowerPoint for Chapter 21 (digestion) is posted on BlackBoard under course documents. Your test is on Monday and it will be a mix of multiple choice, labeling and short answer.

Lab: Daffodil Dissection

We are moving from human anatomy to plant anatomy. This week in lab we will be starting our (short) unit on plants and plant anatomy. This lab will begin with a short discussion on dichotomous keys. After that, students will dissect a daffodil and answer questions about the parts of a flower.





Daffodil Dissection

a. Safety

i. If using sharp scissors, only use when told; don’t wave them around. If using scalpel (very sharp), only use when told; make cuts carefully with blade down on the paper paper towel and fingers out of the way

b. Stem—use scissors to cut through the flower stem in various directions: across,

up, diagonal, and compare with each other. What do you see?

Cut Across	Cut Diagonal	Cut Up

c. Line up the stem slices on a paper paper towel.

i. What is the xylem used for?

ii. What is the phloem used for?

iii. The stem stores surplus food for growth during the season and overwinter to support new growth in the spring.

iv. Bulbs are modified stems and also store food for the plant.

d. Does your daffodil have sepals? (the outer ring of flower parts, usually green,

that protects the young flower bud) Circle YES or NO

i. In daffodils the sepals are fused to the outer flower petals.

ii. Do the outer petals look different than the inner ones? How?

iii. When sepals and petals look similar they are called tepals. Does your flower have tepals?

e. How many petals does your daffodil have?

Number of inner petals:

Number of outer petals:

i. Notice that the bottoms of the petals (or tepals) and the cup are fused together. This is called the flower tube.

ii. Use your fingers to pull off each petal or cut them off with your scissors.

iii. Line up the petals on your paper paper towel.

f. Use your scissors or fingers to cut down the sides of the cup and remove the cup.

i. What is the purpose of the flower petals and cup?

g. The reproductive part of the flower is what you have left.

i. Look at the stamen. Is this the male or female part of the flower?

1. How many stamens can you count? On a daffodil the stamens are all of the stalks except for the taller, different one in the center.

2. Stamens consist of two parts, what are these?

3. What do filaments do?

4. What do anthers do?

5. Draw and label one of the stamen of your daffodil.

6. How many stamens does your flower have?

7. Use your tweezers, scissors or fingers to remove the stamens on your flower. Try to leave the taller, center female part of the flower.

8. Touch the stamens and see if any pollen comes off and sticks to your finger. Why are stamens sticky?

9. Line up the stamens on your paper towel.

ii. Look at the female part—the pistil or carpel.

Draw the female part and label the following structures: Stigma, Style and Ovary.

a. Cut the female part open diagonally. What do you see?

Microscopes:

Either draw or describe what you see for each of the following parts of the plant. You will be graded on your descriptions.

Inside of the stem. Make sure to state if you are looking at an up, across or diagonal cut .

Outer Petal

Stamen

Pistal

Perfect flowers—have all the standard parts including male and female organs. Are

daffodils perfect flowers?

This lab was adapted from DaffodilUSA

Fad Diets Flyer

Choose a fad diet or supplement and research the following information creating a ONE page flyer:


1. How does it claim to work?

2. What are you supposed to eat?

3. Using the chart on page 443 what category does it fall into?

4. What are the risks associated with this diet (read 21.16 and 21.17 for more information on what nutrients your body needs).

5. Include at least one picture

6. You must cite at least 3 sources.

7. You can do this on a computer or by hand. Bring a hard copy to class on your assigned due date.

Due Dates: A block on Thursday, D block on Friday.
C block, we will go over this material on Friday and your Flyer will be due on Monday.

Digestion!

Today in class students read up on digestion (sections 21.4-21.11) and then started to create either a short PowerPoint, pamphlet or children's book on what happens to the food we eat.

Homework: A & D blocks: finish your ppt/book/pamphlet for homework.
C block: read sections 21.4-21.11 so that you can have the majority of class time to work on your digestion ppt/book/pamphlet

Need some inspiration? Flash back to your childhood with the Magic School Bus.