Fifty years ago, there were several hundred varieties of wheat grown in the Middle East. Now a few of the more modern high responder varieties have replaced the indigenous species. What are the implications of this change?

A. The high responder varieties will need specialized harvesting methods because they are so productive.
B. Genetic resources are diminished and an epidemic of wheat disease is more likely due to the reliance on few species.
C. The productivity of wheat should continue to rise and increase the availability of food per person.
D. The biodiversity of wheat species has increased because of the introduction of few hybrid species.
E. All of these are correct.


Answer: B

Environmental & Atmospheric Sciences

You might also like to view...

What types of geologic evidence are used to infer past glaciations?

What will be an ideal response?

Environmental & Atmospheric Sciences

The weathering process of _______________ is a type of solution that involves carbon dioxide and water molecules reacting with rock, particularly limestone

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

Which one of the following statements about population growth is correct?

A. The number of offspring produced per female is very important. B. A high percentage of young individuals in a population we result in slow population growth. C. The number of males in the population is more important than the number of females. D. Dispersal increases the rate at which a population grows.

Environmental & Atmospheric Sciences

Condensation nuclei are important in the atmosphere because

a. ?they provide most of the minerals found in water. b. ?they make it easier for condensation to occur in the atmosphere. c. ?they are the sole producers of smog. d. ?they filter out sunlight. e. ?they provide the only means we have of tracking wind motions.

Environmental & Atmospheric Sciences