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Question 13 of 20
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13. Which of the following is a leguminous cover crop that can add nitrogen to the soil?
© A. Corn
O B. Clover
O c. Barley
OD. Wheat
O Mark for review (Will be highlighted on the review page)
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Answers: 2
Biology, 21.06.2019 18:30
The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.
Answers: 3
Biology, 22.06.2019 00:10
Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.
Answers: 1
Biology, 22.06.2019 00:10
Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c
Answers: 2
Exam Instructions
Question 13 of 20
Select the best answer for the question.
13. Which...
Select the best answer for the question.
13. Which...
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