Thursday, March 25, 2010

Bio 120 Review Exam 3

Here's some questions to make those brain cells churn out the ATP!

1. What are the differences between aerobic and anaerobic respiration, and which is more efficient?

2. What are NAD+ and FAD used for?

3. What are the three steps in aerobic respiration, and where does each occur?

4. During which step of cellular respiration is the most ATP made?

5. During aerobic respiration, how many ATPs are made from one molecule of glucose in most cells?

6. What is the role of oxygen in aerobic respiration?

7. Describe how the ATP is made during chemiosmosis

8. What is produced by your muscle cells if there is not enough oxygen available at the end of glycolysis for aerobic respiration to continue?

9. Yeasts do a kind of anaerobic respiration called ____________, and produce ___________ and _________ along with 2 ATP

10. What are the important end products of the Citric Acid Cycle, and what happens to each of these products?

Here are the photosynthesis questions for review:

1. Which colors of light are most strongly absorbed by chlorophyll?
2. How is oxygen released during photosynthesis?
3. Why is water needed in photosynthesis?
4. What are the products of the light dependent reactions?
5. What is made in the light independent reactions?
6. What is the role of RUBP in photosynthesis?
7. What kind of plants use PEP and what advantage does it give them?
8. How are CAM plants different from others in the way they do photosynthesis?
9. What kind of organisms can do photosynthesis?
10. Where inside the chloroplast do the light dependent reactions happen?

More Review Questions about Plants:
1. Compare and contrast the movement of water and food in plants. Include in your answer what kinds of tissues and processes are involved in both.

2. Xylem is functional when dead at maturity while phloem is functional only when alive. Why?

3. In phloem, what is the role of the companion cell?

4. What is the difference between xylem in flowering plants and the xylem found in gymnosperms?

5. What is cohesion of water, and how is this different from adhesion?

6. What part of the root absorbs water?

7. What is the function of the anther in the flower?

8. Which of the following is where one would find ovules?
A. in an anther
B. in the ovary
C. in the stigma
D. in the style

9. Ovules are
A. eggs
B. spores that will become pollen
C. spores that will become eggs
D. immature seeds
E. pollen grains

10. In double fertilization the first sperm fertilizes the egg and the second
A. dies
B. is only used if the first sperm cell dies
C. fertilizes another egg
D. fertilizes a haploid endosperm mother cell to make diploid endosperm
E. fertilizes a diploid ( n+n) endosperm mother cell to make triploid endosperm

11. What is the function of fruit?

12. Microspores become
A. the embryo sac
B. the mature male gametophyte
C. pollen grains
D. all of the above
E. only B and C above

Sunday, March 21, 2010

The Antelope Valley

The California Poppy Reserve had some blooms, but the most of the hillsides were not in bloom yet. However, after driving around on the roads around the reserve, we saw carpets of goldfields, poppies, but very few lupine.

We saw thousands of poppies, but only one yellow one.

Goldfields and Poppies

The sepals of the poppy flower cover the bud, then fall off as the bloom opens

I noticed this poppy was opening up, and as I was taking photos of it...

...the sepal popped right off.

Friday, March 19, 2010

Where to see wildflowers in Southern California

Desert Dandelion and Phacelia, Mojave National Preserve

Here's a list of some of my favorite places, however, there are many more areas to explore!

Antelope Valley Poppy Reserve

Peak bloom is usually late March, you can see California poppies, goldfields, owl’s clover and others.

Anza Borrego State Park

Desert lilies, sand verbena, desert primroses and more

Bloom is happening right now!

Carrizo Plain National Monument

Amazing fields of flowers in a very remote area. Lots of dirt roads.

Death Valley National Park

The peak bloom should be late this month into mid April

Yucca buds, Joshua Tree National Park

Joshua Tree National Park

It was snowing in Joshua Tree two weeks ago. According to the ranger I talked to, peak bloom in park expected late March to Mid April.

Mojave National Preserve

Desert lilies, evening primrose, desert dandelions, Phacelia, sand verbena and more!

The Santa Rosa Plateau Ecological Reserve

Amazing! Over 8,000 acres of oak savanna, chaparral, and grasslands

39400 Clinton Keith Road is located at the southern end of the Santa Ana Mountains in southwest Riverside County, near the city of Murrieta, 92562. I just love this place!

Wildflower “ Hotlines”

Desert Wildflower Hotline

Theodore Payne Foundation

Link to other Wildflower info sites. This link will give you dozens of places to visit to see the flowers.

Click here to go to a page full of places to see wildflowers

Recommended desert wildflower books:

Mojave Desert Wildflowers by Pam Mac Kay. (2003)

Features lots of information about how the plants were used by Native Americans. Full color photos, great descriptions of plants, and interesting comments about them.

Wildflowers of the Colorado Desert by Jon Mark Stewart (1993)

The Colorado Desert is a part of the Sonoran Desert that extends into California. It includes the Anza-Borrego area as well as parts of Joshua Tree National Park

Wednesday, March 17, 2010

Stealing electrons from single celled algae to generate electric power

Chlamydomonas, a single celled algae

New Scientist has a report on its webpage about scientists who inserted tiny gold electrodes into single celled algae called Chlamydomonas, to syphon off some high energy electrons created during photosynthesis. The electrons were then used to generate electricity.

The process was less efficient at generation of electricity that a solar cell, and would be hard to do on a large scale, but the researchers involved believe they can make the process more efficient in the future.

You can read the whole article here

Sunday, March 14, 2010

The Santa Rosa Plateau and Chocolate Lilies

I love the Santa Rosa Plateau. There are miles of trails, vernal pools, amazing wildflowers in the spring, and peace and quiet. All this only a few miles from the I-15. The Plateau is over 8,000 acres of what Southern California used to be like. It was saved from a huge housing development in the early 1990's by a local group of citizens and the Nature Conservancy, and is now part of the Riverside County Park system.

Chocolate Lilies were scattered in the grasses along the trails
Red-Tailed hawks were riding the thermals in the late morning
This Red-Shouldered Hawk was doing an aerial display, swooping up and down over the trees.
Ground pinks were along the trail near the large vernal pool.

Wild Hyacinth

Saturday, March 13, 2010

Anza-Borrego State Park is in bloom!

The wildflower season in Southern California is underway. Anza Borrego State Park has blooms of these wonderful evening primrose, and desert verbena. The primroses bloom in the evening, and are pollinated by a large moth. The blooms then fade the next day.

Desert sunflower and sand verbena

Datura blossom opening. All parts of the Datura plant are poisonous.

Phacelia and chicory
Barrel cactus blossom with a pollinator

Another group of desert primrose

Barrel cactus blooms

Desert lily and sand verbena

Joshua Tree National Park should be blooming in late March to mid-April. However, I hear chocolate lilies are in bloom at the Santa Rosa Plateau. Guess where I am headed tomorrow morning!

Tuesday, March 2, 2010

Identical Twin Murder Case

I have mentioned in class that identical twins have the same sequence of DNA in their cells. So if you have an identical twin it is important that he or she stays out of trouble, so that you do not become a suspect. However, until now, I had not heard of a case in which a twin was arrested for a crime the other twin allegedly committed. This case is a horrible murder case in which the suspect killed a woman for her car. You can read about it here