Please help! both need a 3-5 sentence paragraph. Question 1. Within an ecosystem, biotic and abiotic factors interact. 1. Consider a creek running through a meadow in the mountains. what are some of the biotic and abiotic factors of this ecosystem?
Question 2. Now a beaver builds a dam in the creek and the meadow floods, becoming a pond. What do you think will be on the previous meadow and creek ecosystem? How will the biotic and abiotic factors change?

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

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

What statements describe a host organism?