Which of these biomes receives the least amount of rainfall, and therefore has low primary production, nutrient-poor soil, and plant species that are adapted for water-storage?
A. tundra
B. alpine
C. chaparral
D. desert
E. savannah
D
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Based on the idea that fungi have pores between their cell walls, which allow cytoplasm to move from one end of the mycelium to the other, which of the following hypotheses is the most plausible?
A) If a single mycorrhizal fungus formed symbiotic associations with more than one tree, carbon could travel from one plant to another. B) Parasitic fungi steal nutrients from their hosts. C) Predatory fungi capture their prey by encircling them with hyphae, and the flowing of the cytoplasm through the pores helps the hyphae to move around the prey. D) Fungi function as part of the global carbon cycle not only by converting carbon from one form to another, but by physically moving it from one location to another.
What percent of Earth’s total primary
production is supplied by the ocean’s primary producers?
a. 10 b. 30 c. 50 d. 70 e. 90
Transcription begins when RNA polymerase binds to the DNA at the
A. intron. B. start codon. C. terminator. D. promoter.
Microbes can be challenging to study because they often grow in complex communities and it may be difficult to separate the various species from one another to study individually. Which of the following laboratory "tools" or techniques may be of the the most help with separating out different species from complex mixtures?
A) Use of enriched agar for culture B) Use of light microscopy C) Use of transmission electron microscopy D) Use of selective agars for culture