Although the authors disagree completely on the use of GE crops, there are one or two points of view they share. Review the statements below and select one that represents a shared view.
a. Globally there is enough food available for all humans.
b. Plant biotechnology is the best approach for conserving natural resources.
c. People in some parts of the world will need more food.
d. Agro-chemicals are a safe way to increase crop yields.
Answer: c. People in some parts of the world will need more food.
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The four elements that make up more than 96% of the weight of living organisms are oxygen, carbon, hydrogen and
calcium.
Indicate whether the statement is true or false.Many birds, such as seagulls which rarely drink fresh water, deal with the osmotic stress of taking in large quantities
of salt in their food mainly by ____.
a. active transport of ions into the body through their feet b. excreting nitrogenous wastes through their kidneys as urea c. active transport of ions out of the body by chloride cells d. excreting excess salt through the actions of specialized salt glands in their heads e. maintaining high levels of urea and trimethylamine oxide in body fluids
Which of the following is true of phloem?
a. conducts water up the plant b. conducts mineral ions up the plant c. connects with roots d. connects with leaves e. transports plant-manufactured organic products
Which type of cell would have the hardest time exporting waste?
A. long and wide B. large and round C. irregular and long D. smooth and cuboidal