Which of the following describes a community? a. a lifeless desert of rocks, sand, and high temperatures b. a hole in which a ground squirrel lives c. a forest of birds, insects, and squirrels d. the ocean i will give brainiest to whoever took the test! dont lie!

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

Witch theory suggests all living things are made up of cell or cells

Which is a function of vascular tissue? a. to perform photosynthesis b. to transport water and nutrients c. to absorb minerals and sugar d. to interact with soil fungi