Which statement is an example of mutualism?
a. a tick sucks blood from a moose.
b. algae live in the fur of a sloth.
c. a robin builds a nest.
d.
silverfish travel with ants.
halp asap ?

What adaptation is apparent in the bodies of the three tortoise species shown in figure 16-2

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Give examples of selective advantage of organism’s body part/organ