The diploid garden pea plant has 14 chromosomes. The haploid fungus Neurospora crassa has 7 chromosomes. Neither organism has separate male and female individuals. Therefore, the number of linkage groups in these two organisms is:
A. Garden pea has 14 linkage groups, and Neurospora has 7
B. Garden pea has 7 linkage groups, and Neurospora has 7
C. Garden pea has 8 linkage groups, and Neurospora has 8
D. Gardent pea has 15 linkage groups, and Neurospora has 8
B
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Suppose you saw the seedling pictured at the right while walking in the woods.
a. To which gymnosperm phylum does the plant belong? b. Identify structures a) seed coat and b) cotyledon.
Base sequence variations between individuals that result from point mutations are called
A) polymorphs. B) small nuclear polymorphisms. C) deletions. D) single nucleotide polymorphisms. E) restriction fragment length polymorphisms.
Economists have been comparing the monetary value of intact habitats with the value of using (destroying) those habitats (such as for logging or farming). They find
A. the intact habitat is more valuable than the destroyed one in most cases studied. B. increased invasion in intact habitats renders it worthless within a few years. C. the immediate economic gain is worth it, such as in the shrimp farms in Thailand. D. clearing the forest for agriculture, as in Cameroon, provides jobs, housing, and long-term economic benefits. E. the long-term problems are minimal, and usually economically minor, it is more of an aesthetic problem than a monetary one.
Which one of the following food contaminations is best prevented by cooking to safe temperatures?
A) Botulism B) E. coli C) Spoilage D) Acidophilus