Environmental changes in a watershed lab report (essay)

To examine how environmental changes affect the health of a watershed and to predict the effect of human activity on the watershed

TimeApproximately 60 minutes

QuestionHow do environmental changes affect both living and nonliving things in a watershed?

SummaryIn this lab, you will study a virtual model of a watershed to see how point and nonpoint source pollution affect the watershed. Next, you will create food chains. Finally, you will model scenarios of environmental changes and observe the effect of these environmental changes on a food chain you created. This will help you understand how the overall health of a watershed is affected by changes in environmental factors, such as populations of organisms, water quality and flow, and human activity

Explanation:

layer 3 is younger than layer 6.

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle