Which of the following adaptations helps a plant conserve water?
1.Stomata positioned near indentations that reduce air movement.
2.Air spaces between cells in the mesophyll.
3.Larger plasmodesmata in drought-stressed plants.
4.Leaves oriented perpendicular to the sun.
1
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Conjugation is useful for determining relatedness between bacteria at the species level because it never occurs between organisms of different genera.
Answer the following statement true (T) or false (F)
Which community type seems to have a higher biodiversity, the prairie dog or the mesquite?
a. prairie dog b. mesquite
Since the 1970s, approximately 40 new infectious disease agents have been discovered, including SARS, chikungunya and zika. The ability of these agents to spread rapidly and cause global concern is due to all of the following except
A. communities are spreading into rural areas/wildlife habitats. B. individuals are traveling more frequently and farther distances than in the previous half-century. C. communities are becoming more sparsely populated. D. communities are becoming more densely populated.
During sexual reproduction, Saccharomyces cerevisiae forms haploid spores that are enclosed in a sac. Therefore Saccharomyces is classified as a(n) ________.
A. basidiomycete B. ascomycete C. chytrid D. glomerulomycete E. cryptomycete