Muddiest Point

I am confused what the ecological, economic, and humanistic importance is to invertebrates and the ecological, economic, and humanistic aspects of vertebrates.

Middiest point

My muddiest point is that I still do not understand the difference between Agnatha, Chondrichthyes, and Osteichtyes.

Class on Thursday, 2/23

Today in class, we worked on a lab called the General Classification of Vertebrates on pages 41-42. In this lab, we observed many vertebrates which were preserved in jars and we used the identification key in the lab to figure out which kingdom, phylum, and class that vertebrate belonged to. At the end of class we just watched a bit of a video about reptiles.

Our only homework for today was to comment on a Muddiest Point, due Tomorrow. Also study for our unit test on Monday! Remember that the TV add is due Tuesday, the 28th.

Also we had a sub today, so we didn't hand in our homework on pages 54-55.

KEVIN will be the next scribe

Muddiest Point- PatrykS

My muddiest point is understanding: Humanistic importance of invertebrates...I dont understand the concept well enough.

Muddiest Point

what are the differences between the classes of fish, and what are example of each?

JoeM's muddies point

My muddiest point is the difference between a vertabrate and a chordate.

Scribe 2/22

First, we handed in our homework which was lab pages UP30-31. Then, we learned about the animal of the day. Today, the animal was a narwal. It belongs to the mammalia class. A narwal is a type of white whale and it has a "unicornlike horn" on its head. Nobody knows why it does, but one theory is that it uses it to joust with other narwals. After, we took our quiz on the vertebrate chart and we were allowed to use our charts. Next, Mrs. Stein went over notes with us. Here are the notes:

Phylogenic Trees

- shows evolutionary relationships

Embryo Development

- protostomes: mouth develops first

- most invertebrates

- deuterostomes: anus develops first

- chordates, echinoderms

Body Cavity Evolution

- coelom: body cavity lined fully with mesoderm

- supports internal organs and movement

- acoelomates: no cavity

- pseudocoelomates: cavity partially lined in mesoderm

- roundworms(nematods)

- coelomates: cavity completely lined in mesoderm

- annelids, mollusks, humans

Chordate characteristics

1. Notochord- supportive rod thru the dorsal side

2. Pharyngeal gill slits- present @ some point in development

3. Dorsal hollow nerve cord

4. Tail

After we finished the notes, Mrs. Stein explained the homework and wevhad a little time to work on it.

HOMEWORK:

1. Test Monday!!!!

2. Muddiest Points due by TONIGHT!

3. Muddiest Point Comments due by Friday @ Midnight! And yes they are mandatory. They are not optional this time!!!

4. Finding Oddball UP54-55 due TOMORROW

5. TV Ad due 2/28

NEXT SCRIBE IS ANDRIJANA!

Muddiest Point

My muddiest point is the difference between chordates and vertebrates. How can all vertebrates be chordates, but not all chordates be vertebrates?

Muddiest Point

My Muddiest point is what animals are in the aves section?

Muddiest Point

My muddiest point is on the whole invertebrate section. Any key characteristics that are very helpful for EACH group that could help me distinguish one from another.

Muddiest Point 2/22

My muddiest point in this unit is the humanistic and economic importance of invertebrates. What are those again?

Muddiest Point

My muddiest point is on the body cavity. I am confused on coelomates, acoelomates and psuedocoelmates.

Thanks!

Muddiest Point

My muddiest point in this unit was understanding the difference between the 3 groups of fish: Agnatha, Chondrichthyes, and Osteichthyes. Thanks!

GabbyM's Muddiest Point

My muddiest point for this chapter is what is the humanistic and economic importance of invertebrates. Thanks!