Two species benefit from interaction with each other Example: A hummingbird gets food from the nectar of a flower and then spreads the nectar’s pollen, helping the flower reproduce.

: One species benefits from the interaction, and the other species is harmed but not necessarily killed

Example: Ticks feed on other animals’ blood, which can hurt the other animals.

: One species benefits from the interaction, and the other species is neither helped nor harmed

Example: Egrets rely on cows to stir up dirt and bring food to the surface, but cows do not benefit.

1. which statement is true regarding monocytes? a. they digest pathogens. b. they produce antibodies against cancerous cells. c. they have a granular appearance under a microscope. d. they produce antibodies against microorganisms.

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

Round peas are dominant to wrinkled. what would you cross a round pea with to determine if it were heterozygous or homozygous dominant? why? ?