Describe the spatial patterns of light and nutrients in a lake, and explain why these patterns exist
What will be an ideal response?
Light decreases rapidly from the surface to the lower depths because water and suspended particles absorb light. Nutrients are tied up in organic matter, which sinks to the bottom and releases nutrients there through decomposition.
You might also like to view...
Lignin degradation by basidiomycetes is an aerobic process that is catalyzed by phenoloxidases.
Answer the following statement true (T) or false (F)
Sexual selection, such as occurs when males compete for access to fertile females, frequently influences aspects of body form and can lead to _____
a. male/female differences b. male aggression c. exaggerated traits d. all of these
The California populations of the Northern elephant seal are descendants from a very small population of seals that was overhunted in the 1890s. Heterozygosity in this population would be expected to be ________ due to ________.
A. slight; the founder effect B. great; assortive mating C. great; disruptive selection D. slight; a bottleneck effect E. great; a bottleneck effect
All members of the golden hamster species known today are descendants of a single litter collected in Syria in 1939. Its diploid chromosome number is 44. Two other species of hamster, each with a diploid number of 22, overlap geographically in Syria
The golden hamster is thought to be a new species from the mating of a male and female of the two other hamster species. What mechanism might explain this recent event of speciation? A) Polyploidy B) Adaptive radiation C) Formation of a fertile hybrid and halving of the chromosome number of this hybrid D) Disruptive selection E) Temporal isolation