Finish the Lab5 biology report (20 questions) within 24 hours. The first file is the question, answer these questions on the second file, the report. Link for Lab Exercise 1: https://www.whfreeman.com

Week 5 Lab Report

Student #: __________

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Summer 2020

Exercise 1

1. [3] Record your data for the number of cells in each stage of the cell cycle observed in normal tissues (after viewing the first set of samples, press Reset to view sample 2).

Table 1

1. [0.5] For the same population size, is there a consistent trend in allele frequency (does it increase or decrease consistently)?

1. [0.5] As population size decreases, what happens to the effect of genetic drift (does the allele frequency change significantly)?

1. [1] As population size decreases, what happens to the likelihood of an allele getting fixed? Does the allele always become fixed at a given population size? If the allele is fixed, does it reach 0 or 1?

1. [1] What can you conclude from these results about the nature of genetic drift?

Exercise 2

1. [0.5] What is the mean beak depth (red line in Figure 2.2)?

1. [0.5] What is the range of beak depth?

1. [0.5] What was the mean beak depth in 1978?

1. [1] Did the finch population evolve from 1976 to 1978? Explain your answer.

1. [3] How does the change in beak depth fulfill the 3 conditions necessary for natural selection? Provide evidence for each from the information provided above. We will assume that reproduction is almost always the case, so consider the other three conditions here.

Condition#1

Condition #2

Condition #3

Exercise 3

Part A

1. [3] Fill in the results in table 1.

1. [5] Make a graph showing the % resistance over time for each of the four rounds. Use a different colour or style of line (dashes, dots, etc.) to indicate different trials, and include a legend. Label the axes, and provide a descriptive title. The dependent variable (see lesson 1) should be on the y (vertical) axis. You can make a graph in Excel (or similar) or draw by hand and take a photo.

1. [1] Imagine that you feel better (no symptoms) when the bacteria population is less than five. However, you transmit your infection to another person. What is the possibility that person is infected with highly resistant bacteria (hint: look at your data on % resistance).

1. [0.5] What happens in round 3?

Part B

1. [4] Describe how natural selection leads to TB drug resistance. Use the terms fitness and adaptation in your answer.

1. [1] Sometimes patients stop taking the antibiotic when they feel better. How does this increase the amount of drug-resistant bacteria in the population?

1. [1] How does drug-resistance (as a genetic trait) arise in the first place?

1. [2] The narrator in the video concludes, “Our very survival depends on an understanding of evolution.” What do they mean by that?

Exercise 4

1. [6] Identify the likely diet (herbivore, omnivore or carnivore) for each mammal shown below. Give at least three reasons for your choice in each case.

1. [2] Describe (with examples) how adaptive radiation has given rise to specialized dentition in mammals.

BISC 100 – FIC Lab 6