Author: Anonymous

Molecular structures that perform specific functions for the cell are:

The topographic map below represents a section of Zaleski National Forest in south-central Ohio.    The black squares at location A represent an original stand of red cedar trees.  The black rectangles at locations B and C represent younger red cedar trees derived from the original stand.  Is this pattern consistent with diffuse dispersal?  Why or why not?

In most animals, females are more selective in mate choice than are males.      a.  In the space below explain this trend in terms of sex differences in reproductive cost.      b.  Females often use an indicator during mate selection.  Why does the female benefit by using an indicator.      c.  Name one situation in which a female might not benefit from being selective in mate choice.

Which one of the following best describes the polygyny threshold model?

An ecologist tracked parameters in a cohort of monarch butterflies.  The ecologist determined number of males and females during several important stages of the butterfly life cycle.      47 males and 34 females after adult butterflies reproduce and begin migration.      625 “male” eggs and 653 “female” eggs when when eggs are laid.      148 males and 138 females when adults emerge from cocoons.      379 males and 431 females when larvae hatch from eggs. Use the calculator available through Honorlock to calculate the secondary sex ratio.

An ecologist records the following abiotic factors in a stretch of stream:      Steep gradient, frequent falls and rapids.      Most water is from groundwater.      Turbidity is low (water is very clear). Which of the following characteristics is the ecologist also likely to record?  Select all correct choices. 

Below are the typical stages of soil formation.  Match “#1” with the first stage, match #2 with the second stage, match #3 with the third stage, match #4 with the fourth stage, and match #5 with the fifth stage.

Which one of the following best describes “Bateman’s Principle”?

The bird below is male American woodcock.  Males and females are very similar in appearance.  Males do not participate in nesting or care of offspring.  Females are known to engage in mate selection.    Based only on the physical appearance of the bird and the little information provided above the image, speculate on the possible criteria females use to select a mate.  Explain your speculation.

The following reaction at equilibrium is used to answer questions 25-28: X(s) + 2Y(g)