Some biology questions...animals and fungi?

1.a sheet of muscle called the diaphragm is found in


a.birds


b.mammals


c.reptiles


d.A and B


e.B and C


i think its E





2. Differentiation of teeth is greatest in


a.sharks


b.mammals


c.amphibians


d.reptiles


e.bony fishes


uhh...no clue





3.among the invertebrates, arthropods are unique in possessing


a.a notochord


b.jointed appendages


c.open circulation


d.segmented bodies


e.ventral nerve cords


i think its c





4.which of the following five structures would you be more likely to find in an organism showing radial symmetry?


a.a head


b. a well developed central nervous system


c.tube feet


d.fins


e. a muscular tail





i think its E but i have no clue to be honest.





you dont have to answer all just tell me the ones you know please this is hard as heck lol and im researching all over the internet, thanks in advance

Some biology questions...animals and fungi?
1. b. mammals


2. b. mammals


3. b. jointed appendages


4. c. tube feet
Reply:1-e. You are correct. Mammals and reptiles have diaphragms (although the details vary); birds do not.





4. The answer is c. Think of a starfish.





3. Let's see...molluscs have open circulatory systems, so it's not c. It's definitely not a (notochord); some nematodes and annelids have ventral nerve cords, so it's not e. Segmented bodies are found in annelids, so it's not d.





That leaves b, jointed appendages. Unfortunately, I think of our arms and legs as jointed appendages so I'm not sure **any** of the answers are actually correct.....sorry.....





2. I'm not sure what is meant by differentiation here but I'm going to go with sharks. They replace their teeth every couple of weeks, and they have a number of different shapes (see link below).



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