Biology, 10.09.2019 23:30, shoobywee

Two students completed an experiment to determine if pesticide use at local farms was causing fish kills in a local pond. the steps of the experiment are listed below. select different locations to collect water samples in the pond. collect a 5-ml water sample at 8 am at a different location each day for 10 days. measure the amount of pesticide present in each sample using the same measurement tools. after analyzing their data, the students conclude that pesticide runoff from farms is not causing the fish to die in the pond. which of these statements best describes why their conclusion is not valid?

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answered: Guest

a community that experiences major changes undergoes progress

answered: Guest

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

answered: Guest

This is s cute awee : (( . well if she's showing you signs that she may like you , then shoot your shot ! don't be afraid . & if you're unsure that she's giving you these signs , then wait out for a little bit . most girls are different . some may act really sweet , but only bc you're a good friend of hers . that , or she might like you . you just never know . but i think you should sit down with her & tell her how you feel . but don't be awkward & shy . just be straight up & tell her how you feel . if the feelings aren't mutual , then don't cry about it . you need to respect her decision & look for others in the world . feelings can be difficult & confusing , but don't be afraid to show them . i say you play it out & if you're still unsure about it , talk to her . - rach

answered: Guest

When scientist examine data such as historical documents, they are using the "scientific methods"

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Two students completed an experiment to determine if pesticide use at local farms was causing fish k...