Scribe:Evidence Revolution

Hey guys, it's Eunice L.
Today, we reviewed Darwin and Lamarck. Finding similitaries and differences between both of their theories. We then moved onto Evidence Revolution.
HOMOLOGOUS STRUCTURES
Are similar organisms that adapt to different enivronments in which the functions of appendeages are changed.
ANALOGOUS STRUCTURES
Are different organisms that started to live in similar environments in which the functions of appendages evolved, performing the same function.
VESTIGIAL STRUCTURES
Are structures that continue to remain in organisms but have no fuction. Such as leg bones and the pelvis in snakes and whales.
COMPARATIVE EMBRYOLOGY
By obeserving embryos of organisms, embryos that are similar are found to be more closely related.
BIOCHEMICAL EVIDENCE (MOLECULAR BIOLOGY)
The relationship of amino acids and DNA sequences. Such as how a chimpanzee's and a human's hemoglobin are alike.

Don't forget the Endangered Species Project!

Here are some videos about Evolution
http://www.youtube.com/watch?v=uAZmLYWEPGk
http://www.youtube.com/watch?v=yVqJ_mQazik
http://www.youtube.com/watch?v=qBauu1PyOxw&feature=related
The last one I'm not sure if it has much to do with evolution, but I think it's pretty cool.

Extra credit

I'm sorry! I can't comment on the extra credit...
Here's my comment:

The fact that hunters are hunting these poor antelope's is cruel and immoral. The dude from the interview seems like he doesn't really love the animals. He wants money from killing these exotic animals. "Hunting... provides an economic incentive for ranchers to continue to breed these species...(reduced species extinction.") I would have to disagree with this quote from the video. Yes, these species vanished from Chad, Egypt, and other African countries, and they have thrived in Texas, but hunting itself did not boost up the population. This had to be somehow connected with their environmental change. Maybe there wasn't enough food back in Africa, but there's more food in Texas. I don't understand how sacrificing one can bring up an entire population. All that the hunters think about is the "population", but it's not even clear that their hunting is the reason these antelopes are thriving. The bottom line of this problem is not the population numbers, but natural selection- animals are better adapted to the environment (Texas) and survive better reproducing more offspring. I agree with the woman who was against hunting. You don’t create a life to shoot it. I would rather want them to go extinct than to shoot them.

-Eunice Chang

EXTRA CREDIT!!!

Click here to watch the recent segment about the hunting of endangered species in Texas.

For extra credit, post a comment to this post expressing your response and opinion on the story. The quality of your response will determine how much extra credit you get! This opportunity will be limited to the first 4 people in your class to respond.

Boobies the bird!

If you were to hear the question "how many boobies are getting laid"out of context, you might wonder if that is appropriate for a freshman bio class. what was actually being said was how many eggs of the species of birds called boobies (right) were being laid. we have over the last few days been talking about evolution. when evolution comes up, one of the names that comes soon after is Charles Darwin. we have been disusing the evolution that takes place on the islands he visited. we spent some time on birds and how they adapt and what there adaptations are for the birds on the island. we have been talking about why boobies choose to push there sibling out of the nest and leave it to die. we concluded that it was because its harder for the mommy booby to feed 2 chicks insead of just one . this is why the mother of the booby lets this happen. we then talked about the different beaks on birds and how they are specialized with what food they eat. we took a hands on approach with this by taking different tools such as a spoon or pliers to retrieve and open different types of food. we ended up concluding class with this lab.

Eunice Lee will be our next scribe!

Yeah so this is what we learned today. (blog post)

Hello peeps, Trent here, today we learned several things. Mainly about our project that's due in FEBUARY! Remember your project needs to include; factual information, don't make it boring and remember it must be PERSUADING!

Next we learned about sad old Lonesome George...

Whats up with him? Lonesome George, the last remaining Galápagos giant tortoise, may soon be a father after years of efforts by scientists trying to get him to mate (since 1993).

Info about him: Lonesome George, weighing 90kg (14st 2lb) was a native of Pinta, an isolated northern island of the Galápagos. By the late 1960s, it was found that the tortoise population on the island had become close to extinction. George, discovered in 1972, was immediately brought into captivity at the Charles Darwin research station on the island of Santa Cruz .

Finally we continued the movie we started yesterday. The most important thing we learned though was that Darwin observed that the turtles on certain islands were different from other islands (variation). He then went on to notice the variation between the birds beaks on the islands. Another important quote was when the "guy" said that the animals have gone their own way, but shaped by the condition they were in, the environment changed their trait(s). We then continued on to learn about how evolution happens annually with the birds of the islands. This happens because of natural selection. Meaning that females selectively choose mates on the conditions. Like how they sometimes reproduce with a smaller size so they can eat the smaller seed

s more effectively. Same goes for the big seeds, they must adapt to have bigger beaks in order to eat the bigger seeds in dry seasons.

Evolution-Scribe

Hey guys! So sorry I forgot to do this yesterday. Yesterday in class, we started Unit 7 which is called, "Evolution". Evolution is defined as the changing of species over time. The amount of time that we are talking about is hundreds of millions of years. A very important man who brought this idea up was Darwin. His theory stated that species can change over time. This idea came up when he noticed how creatures could be different from one island to the next. This changing can either be beneficial to the species or can affect the species negatively. A negative effect can result in extinction because their new or old adaptions (characteristics) may not fit in with its environment. When most people think of the word evolution, the first thing that comes to their mind is that us as humans, evolved from apes/monkeys. But, the truth is that we share a common ancestor with apes. So to conclude, we all are apes.

2nd Semester! Wooohooo!

Welcome Back!

As 2nd semester gets underway, I encourage you to take a moment to reflect on first semester. If you would like to earn a homework pass, come visit me in the next week and be prepare to answer these questions!

1. Do you feel like the grade you got this semester was the grade you earned? Why?

2. What were you most proud of from 1st semester?

3. What disappointed you most about your performance from 1st semester?

4. What goals have you set for yourself for 3rd quarter/2nd semester?

5. What will you do to achieve those goals?

6. What can I (Mrs. Stein) do to help you?

I look forward to speaking with each of you about how to make this a successful semester!

The first scribe for second semester will be MAGGIE!

super duper muddy point

Hey there! :) So, I was wondering, what's the difference between FSH and LH again? ALSO, what were the two phases called of the graphs? ...One of them was called the follicular phase and what was the other one? THANK YOU!

Muddddyy muddddy point

Hey!its Kara, what the heck is the ectoderm, mesoderm, and endoderm? Where are they?

muddiest point

i do not get what we need to learn about birth control and what about it will be on the test if anything.

>------MuddiestPoint------>

Hello, my muddiest point for this unit is, how can ovarian cancer be formed/happen?

Trenton

Muddy Point

My muddiest point is how the estrogen and progesterone give feedback and kind of the basis of the menstrual cycle.

muddiest point!

Hi guys!

I don't understand what a zygote, chorion, gastrulation, and amnion means.......well I know thats a lot of words but if you guys can help me with at least one that would be GREAT! thanks!

Stuck in the Mud

My muddiest point in this unit is the different between FSH and LH. I know they are hormones but do they have different functions?

MUDDIEST POINT

Hey guys, I know we have been through alot last week and this week. We have watched alot of very GRAPHIC videos, but it's all good, it's nature... i think. Anyhow, what i still have trouble is understanding the menstrual cycle. Also, I'm not sure how estrogen and progesterone play a part in the menstrual cycle?
If anyone can help explain more clearly, that would be great!
Thanks!

point de muddy.

hi everyone! TessaN hereeeee. I missed one day of class where we went over the menstrual cycle, so can someone just give me a summary of what happens and what hormones cause to happen and what the egg does? thanks.

SCRIBE!!

HEY EVERYONE! It's Allie, and today was Tuesday, January 10. In class we reviewed the Menstrual Cycle, and for the rest of class we watched clips of a video. We went over the 1st, 2nd and 3rd trimester, and DELIVERY!! FUN? Yeah I know. What we learned was, in the 1st trimester the head is massive compared to the body, and the placenta is the life support for the fetus. 2nd trimester to start out the fetus is no bigger than a fist, and by the end of the trimester the fetus starts to mimic normal movements such as swallowing, and grasping. 3rd trimester the fetus gains weight FAST, he/she can recognize their mothers voice, and can recognize and move to music (if it's recognized). During delivery, the cervix has to open 10 centimeters, and any where around 2 weeks a way from the due date is safe for the baby to be born. AND REMEMBER STUDY FOR THE TEST THURSDAY!!!!!!

Muddiest point YO

Hey guys! Ok my muddiest point is understanding what the egg does in the menstrual cycle. Or well actually the whole menstrual cycle... I understand that it uses feedback mechanisms and what glands make which hormone and stuff...but im kinda confused about the details of the menstrual cycle.

Muddiest Point

Hey guys so i'm sort of struggling with the feedback system I just cant grab the concept of what signals what and which hormones signal other hormones,etc

HELP NEEDED

heyy its eleni, ok so my muddiest point is the feedback loop but by reading all the other posts, i think weve got that covered soooo im going to put up a different one...

im really confused as to what the difference between estrogen and progesterone is. also if piuitary gland is for growth then whats the hypothalamus for?

^^christmas colors, so sad its over :(

Muddiest Point!

For my muddiest point, I dont know what the negative and positive feedback loop are. I know what the feedback system is but I dont know if there is a difference from that and the feedback loop. And if they are the same thing, what makes it postive and negative. thanks!

*Miracle of Life* Muddy point (?)

This unit was interesting and miraculous to me! The formation of a baby was a more difficult and complex cycle than I thought. A lot of the things we learned so far were pretty straight forward, but I got confused on gastrulation and differentiation. What exactly is the difference between them!?

-Eunice Chang

MUDDIEST POINT...

This has been an interesting unit! AM I RIGHT? Well... my muddiest point is.. like knowing SOME parts of the male/reproductive system, its so hard to remember where everything goes and what their function is!

Muddiest Point!

Whats up?! So im a lot like many other people...I really dont understand the feedback system, and how it works. Whats the deal what that?!

Muddiest Point

My muddiest point is what are all the different stages of the menstrual cycle?

SCRIBE!!

Hey guys!! Sooooo, today we started off class going over some homework. We went over and reviewed the menstrual cycle. Something that helped me remember how it worked was the little chart thing Mrs. Stein wrote on the board that kinda went like this. HYPOTHALAMUS -> PITUITARY GLAND -> FSH & LH -> OVARY -> ESTROGEN & PROGESTERONE. ( LH and progesterone are linked. Whereas FSH and estrogen are linked.) Then the second half of class we took some notes on the idea of contraception, fertilization and implantation. Pretty much the main idea of contraception is to keep it safe when you have sex. But the safest plan is to practice abstinence so there is no possible way to have a baby. Then fertilization and implantation was pretty much just that the fertilization occurs in the oviduct and that there are some cell divisions that we should know about like, the embryo, the morula, and the blastocyst. So yeah, that what went down. Then we went home. :)

Scribe of the day YAY

Hey guys it's catie! So i forgot to post last time...sorry about that. but here's what we did in class today!




We learned all about the Menstrual Cycle and how it runs!



~It is regulated by negative Feedback Mechanisms. It all starts with the hypothalamus, who controls the pituitary gland. Responding to low Estrogen levels, it signals the pituitary to secrete more FSH (follicle stimulating hormone) and LH.



~Then, the follicle (EGG!) develps, which releases more estrogen. This 1st half of the cycle is called the FOLLICULAR phase.

~Next comes Ovulation, where the egg is released.

~Then it's the Luteal Phase. Here, uterine lining builds up. The egg can get fertilized.


If the egg is NOT fertilized, this cycle starts all over again! woo hoo!

****

The chart displays how each gland produces the hormones of the menstrual cycle. (Sorry it's not lined up well...i drew it on paint). Basically, FSH triggers the Ovary to produce Estrogen (that's why they both have purple stars) and LH triggers the Ovary to produce Progesteron (green stars).

******
We also learned a little about contraception today. Contraception means to stop fertilization. In other words, BIRTH CONTROL! There are many different form of birth control, such as pills, condoms, etc. But abstinence is the only 100% affective way to prevent pregnancy.

stick in the mud

My muddiest point is the feedback system and how its works what tells what to do things.

REALLY MUDDY POINT

My muddy point is what happens in alll the different stages in the Menstrual Cycle.. help please.

Muddiest Point

My muddiest point for this unit is what happens in the stages of development and pregnancy

Muddiest point

The muddiest point for me would have to be the stages of a fertilized egg. I get some of them but not all. If you could give me a little help, please.

SCRIBEEEE!!! YAY

So this is Sarah! with me late scribe post..... Any who what we did in class on tuesday!First we started with going over our chart from 34.3 reading I believe haha. The chart was about Internal and external fertilization and development. External fertilization is when the eggs are fertilized outside the body of the egg providing individual. The requirements of external fertilization are; Large number of gametes, and water. Internal fertilization is when the eggs are fertilized inside the body of the producing individual. External development is the same as external fertilization except the child or children are developing outside the body. Internal development is the same as internal fertilization except it is when the egg providing individual is carrying the developing baby inside the body. We also talked about the goals for the male and female reproductive system. Some examples for the female reproductive system are producing eggs, developing the baby, providing nutrients for the child inside the female, etc. Some goals for the male reproductive system are producing sperm, successfully transferring sperm to the female, etc. Finally we finished our video about all types of animals producing babies like, whales, fish, baboons, and many more!!! Well thats all for now! (:

THE WHAT? THE MENSTRUAL CYCLE!

Ello! It's Rachie In the beginning of class we went over the Male and Female Reproductive structures where you could match the word to the correct parts. You can find it on Moodle if you want to practice!

Second, we learned about the Endocrine System. Which regulates MANY bodily functions and maintains homeostasis. In simpler words, it influences almost every cell, organ, and function of our bodies.

Next, we went over slides about the Male/Female Secondary Sex Characteristics.

Male:

During puberty, FSH stimulates testes to produce testosterone.

Your probably wondering... what in the world does FSH stand for!?

F ollicle

S timulating

H ormone

It is released by the pituitary gland. Testosterone causes:

• Larynx to enlarge
• Broad Shoulders
• Facial/Pubic Hair
• Muscle growth

Female:

During puberty, FSH stimulates ovaries to produce estrogen. Estrogen causes:

• Breast development
• widening of hips
• menstruation

Last but not least.... the MENSTRUAL CYCLE!

Remember: Hormones regulate the menstrual cycle.

If you want a little laugh, watch this video.

But if you want to be serious... watch this one.

NEXT SCRIBE IS...................... CATIE W. <3