The loss of plant biodiversity, including the wild relatives of crop species, is harmful because these wild relatives
A) feed most of the world's population.
B) may be suitable for domestication and regional production.
C) are often tastier than existing crops.
D) are a source of genetic diversity that could be used to modify or bolster existing crops.
Answer: D
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California tarweed seeds were able to reach the Hawaiian Islands, and a new species emerged from this isolated population. What concept applies to this example?
A) the founder effect B) hybridization C) punctuated equilibrium D) polyploidy
In Table 8.1, what will be the result of conjugation between cultures 1 and 2?
A) 1 will remain the same; 2 will become F+, leucine-, histidine- B) 1 will become F-, leu+, his+; 2 will become F+, leu-, his- C) 1 will become F-, leu-, his-; 2 will remain the same D) 1 will remain the same; 2 will become F+, leu+, his+ E) 1 will remain the same; 2 will become F+ and recombination may occur
Draw a rooted phylogenetic tree containing seven organisms labeled A to G. Label your tree with the following terms: branches, extant taxa, nodes, last common ancestor, and an outgroup
What will be an ideal response?
During this stage of mitosis, the chromosomes become attached to the spindle at their kinetochores.
A. Prophase B. Prometaphase C. Metaphase D. Anaphase E. Telophase