Blogs for March 29th -April 2
March 31, 2010
1. Which statement describes a difference between plant and animal cells?
a. Animal cells have membranes, but plant cells don’t.
b. Plant cells have membranes, but animal cells don’t.
c. Animal cells have chloroplast, but animal cells do not.
d. Plant cells have chloroplasts, but animal cells do not.
2. Which statements explains why, in a food chain, plants are called producers and animals are called consumers?
a. Plants make oxygen, and animals use it.
b. Plants use carbon dioxide and animals give it off.
c. Plants make their own food, and animals eat other irganisms.
d. Plants use energy from the soil, and animals make their own food.
3. Which statement identifies a characterisitic of plants, ,but not animals?
a. They are producers
b. They need mitochondria
c. They conoduct cellular respiration
d. They have internal vasular structures
4. Which statement describes a major reproductive difference between plants and animals?
a. Plants are producers and animals are consumers
b. Most plants are dormant in winter: most animals are not.
c. Plants have special cell structures that animals do not have.
d. Most plants have both male and female structures; most animals do not.
5. Which statement best describes a characteristic of the organisms in kindom Animalia?
a. They have classified by how they move and obtain.
b.They thrive in extreme enviroments and lack a nucleus.
c.They contain cells that have a nucleus and lack a cell wall.
d.They are multicellular and use chlorophyll to manufacture food.
Process in Big-Screen Plasma TVs Can Produce Ultra-Clean Fuel
March 31, 2010
The process that lights up big-screen plasma TV displays is getting a new life in producing ultra-clean fuels, according to a report presented March 22 at the 239th National Meeting of the American Chemical Society (ACS). It described a small, low-tech, inexpensive device called a GlidArc reactor that uses electrically-charged clouds of gas called “plasmas” to produce in three steps super-clean fuels from waste materials. One is a diesel fuel that releases 10 times less air pollution than its notoriously sooty, smelly conventional counterpart.
“Low-tech and low cost are the guiding principles behind the GlidArc reactors,” said Albin Czernichowski, Ph.D., who presented the report. “Almost all the parts could be bought at your local hardware or home supply store. We use common Read more
Jaw Bone Grown from Adult Stem Cells
March 31, 2010
A Columbia scientist has become the first to grow a complex, full-size bone from human adult stem cells.
Gordana Vunjak-Novakovic, a professor of biomedical engineering at the Fu Foundation School of Engineering and Applied Science, reports that her team grew a temporomandibular joint (TMJ) from stem cells derived from bone marrow. Her work is reported in the online Early Edition of the journal Proceedings of the National Academy of Sciences this month.
“The TMJ has been widely studied as a tissue-engineering model because it cannot be generated easily, if at all, by current methods,” says Vunjak-Novakovic, whose co-authors include Warren L. Grayson, then a post-doctoral student in her lab and now an assistant professor at Johns Hopkins University. Around 25 percent of the population suffers from TMJ disorders — including those who suffer from cancer, birth defects, trauma and arthritis — which can cause joint deterioration. Because the TMJ is such a complex structure, it is not easily grafted from other bones in a patient’s body. “The availability of personalized bone grafts engineered from the patient’s own stem cells would revolutionize the way we currently treat these defects,” she says.
Stems March 29th
March 24, 2010
Glott (tongue)— epiglottic, polyglot, glossolalia, glottal, monoglot, glossectomy
Define two words and write sentences for each word defined.
Stems for April 6th
March 24, 2010
Pot–drink—poatable, potion, potato, potatory, compotem symposium
Blogs March 22-26
March 23, 2010
1. Which characteristic describes all members of the kingdom Plantae and some members of the kingdom Protista?
A. They contain leaves.
B. They contain chloroplast.
C. They are able to decompose nonliving organisms.
D. They are able to obtain energy from other organisms.
Stems for March 23rd
March 17, 2010
nuc (center)–nuclus,nucleate
nuclide
Blogs for March 15,16, 17,18,19
March 10, 2010
1. Which statement correctly identifies a difference bewteen the function of most arteries and veins?
a. Arteries carry red blood cells, whereas veins carry white blood cells.
b. Veins carry red blood cells, whereas arteries carry white blood cells.
c. Arteries carry blood to the heart, whereas veins carry blood away from the heart.
d. Veins carry blood to the heart whereas arteries carry blood away from the heart.
Blog for March 8,9,10,11,12
March 10, 2010
1. What organelle is responsible for producing food for plants?
a. vacuole
b. cell wall
c. nucleus
d. chloroplast
Stems for March 16th
March 10, 2010
strat–layer—-stratigraphy, stratophere, cirrostratus
strata, stratified, substratum
