Multiple CHOICE!!?

1 - scientists believe that modern birds envolved from:





a - theropod dinosaurs.


b - archaeopteryx.


c - therapsids.


d - lizards.





2 - The outer layer of the mammalian brain has many folds that :





a. increase the effective surface area


b. secrete needed fluids


c. form ridges for storing learned behavior


d. transfer heat from the environment








3 - Which is not an example of the use of pheromone ?





a. wolves mark their territories by urinating at the boundaries


b. hyenas give off an odor that keeps different clans of hyenas apart


c. poisonous snakes wind around each other and butt heads


d. ants leave an odor trail followed by other members ok their next.





Plz...Help me out, Thank you so MUCH!

Multiple CHOICE!!?
2. C
Reply:A, D %26amp; D
Reply:I bet that this is homework for you. You don't want to do it. but here is number 1. b. 2. c. 3. c.





For number 3, just infer what pheromone means. All these are easy and I don't know a thing it means.
Reply:you could have looked these up on the internet.


1A-2B-3C
Reply:1 d


2 a


3 no idea
Reply:lol.. judging by the number of wrong answers given you might have been better off researching your homework yourself rather than asking it here.





1 A


2. A


3. C





if you want proof:


1. http://en.wikipedia.org/wiki/Origin_of_b...


archaeopteryx. used to be a contender for the ancestor of birds, but there are good reasons to believe that archaeopteryx was a dead-end evolutionary product.





2. basic science. Everyone should know this.





3. elimination gives you C
Reply:1 is tricky... I'll go with A because B is the first known bird, while A is where they evolved from.





2 - B





3 - C (which you can just eliminate all the other choices cause headbutting has nothing to do with pheromones.)