Important

Question 1

Reproductive fitness-answer to first question on evolution section of final exam

Answer 1

you can take care of species in your group and make them easier

Question 2

mechanacoreceptors

Answer 2

detect
movement in the water

Question 3

Mechanisms snakes have to eat larger organisms

Answer 3

quadrote bone
lower jaw split in half

Question 4

pathway of blood through the amphibian heart

Answer 4

Deoxygenated blood (DB) enters through the vena cava and then enters the first major chamber of the heart (the right atrium)
-From here it passes through the sinus venosus (which provides the pacemaker for the heart)
-It then enters the singular ventricle. DB then leaves the heart through the pulmocutaneous artery
-From there it is sent to the lungs and it is in the lungs where the blood becomes oxygenated (OB).
-The blood then enters the pulmonary vein and it enters the 3rd chamber of the heart known as the atrium.
-From the left atrium, the blood enters the ventricle
-From the ventricle, blood crosses through a muscles wall known as the conus arteriosus.
-In the conus arteriosus it then sends blood towards the aorta
-Blood then leaves the aorta and enters the systematic circuit and it is then transported towards the rest of the body

Question 5

chordate charcteristics 4 key

Answer 5

notochord

nerve chord runs parallel to notochord

gill slits penetrate wall of pharynx

tail extends past anus

Question 6

ampullae of lorenzio

Answer 6

sensory cells
that are sensitive to electrical
potentials, detect prey which give
off a weak magnetic field