How has human activity added to eutrophication of freshwater lakes?
What will be an ideal response?
The addition of various chemical compounds to the environment can have a variety of effects on the ecosystem. One example is the addition of phosphorus into the environment by runoff from fertilizers used in farming areas. When phosphorus levels increase, algae populations grow exponentially and form algal blooms over the surface. Many lower-level organisms die as a result, and decomposers consume a lot of oxygen. A major consequence of these events is the depletion of oxygen, which ultimately affects fish populations that can't tolerate low levels of the gas.
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In African finch populations, selection pressures favor birds with bills that are ________
a. either large or small, in an example of disruptive selection b. small, in an example of directional selection c. large, in an example of directional selection d. large, in an example of sexual selection
As a quality control officer in Company A, you are challenged with sporadic contamination of your pineapple juice product. Initial plating of the juice showed two (2) mixed colony morphologies on general purpose media. With the knowledge that fruit juice products are typically contaminated with yeast and bacteria, describe the methods you will use to isolate and differentiate the microbial contaminants in your pineapple juice.
What will be an ideal response?
Chemicals that make up living organisms are constantly recycled between organisms and the Earth
Indicate whether the statement is true or false
The ________ is a type of vascular tissue that conducts water.
Fill in the blank(s) with the appropriate word(s).