This question is incomplete. The rest of the question is listed below:
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To measure the volume of the starch-water mixture in the dialysis bag, the students should have used a
(1) meterstick (3) graduated cylinder
(2) triple-beam balance (4) test tube
The answer is 3) graduated cylinder. A measuring stick to measure depth would not have worked as the overall volume of the beaker containing the </span>dialysis bag would not have changed. A test tube would generally have insufficient volume to measure the volume of the <span>dialysis bag and a test tube is generally not graduated. A triple beam balance is generally used to weigh mass and not volume. </span>
A deer eats certain plants, but if there is variation, it may like certain plants more than others. The deer may be causing extinction to those certain plants because of eating to much of it. The variation effects the survival of a species because of its unique characteristics called adaptations within the species. If there was a change in an environment, you have a greater chance of survival. Take the deer example. If they had stayed the same, all of that species could have survived because the deer did not eat it, or all of it could have not survived if a new organism changed the environment and ate it. However, with variation only a few of that species may die.
C.) Species < Population < Community
Population consists of all similar organisms in a specific area and community is the group of all kind of individual in that specific area
Hope this helps!