Quiz.7.10.key - QUIZ 7[5 pts Name_KEY BIOLOGY 325H 1[2 pts...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: QUIZ 7 [5 pts] Name_______KEY__________________ BIOLOGY 325H 1. [2 pts] Hamilton's Rule states that for selection to favor genes which produce an altruistic behavior, that behavior must satisfy the equation 'rB > C'. Define the r and B variables in a few words, being careful to state whether the variable refers to the altruist or the recipient: r the degree of relatedness of the altruist and the recipient, e.g. if the altruist is a sibling of the recipient, their relatedness is 0.5 because they share 50% of their genes B the benefit the recipient gets from the help provided by the altruist, i.e., how much the recipient’s fitness is increased in terms of number of offspring 2. [2 pts] Why is survivorship plotted on a log scale when we use the cohort data from a life table? If there is a constant rate of survivorship (or death) per time period for a cohort, then plotting the data on a log scale will cause the trend to be linear. So we plot survivorship on a log scale to make it easier to see when there is a constant rate of survivorship. (See the example graphs below of the same data on normal and log scales.) 12,000 10,000 10,000 SUVIVORSHIP 1,000 8,000 6,000 100 4,000 2,000 10 0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 TIME 3. [1 pt] Give two reasons why a population cannot increase exponentially indefinitely? There were many possible answers here. As long as you identified two limiting factors, e.g., food availability and suitable territories, you were given credit. ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online