BIOL 202 Study Guide - Spring 2018, Comprehensive Midterm Notes - Fitness Biology, Zebra, Yellow Jacket
BIOL 202
MIDTERM EXAM
STUDY GUIDE
Fall 2018
LAB 1: EXPERIMENTS AND EXCEL
Name: Isbah Afzal
Class: BIO202-008
Circle the correct answer, or provide a short (two word) answer to each question below:
1. There are two hospitals in a town. One of them is smaller than the other. 70% of
the babies born a particular day are boys at one hospital and 50% of the babies
born on that day were from the other hospital. Which hospital was most likely to
be the smaller hospital, the one with 70% boys or the one with 50% boys?
Answer: 70% is smaller.
2. The true population mean is known. You take a random sample from that
population of sample size 10 and another sample of sample size 20. Which sample
mean (N=10 or N=20) do you expect to be closest to the true population mean? Is
this guaranteed to be true?
Answer: N=20 will be closer to the true population mean. It is not guaranteed to
be true.
3. What happens to the sample mean as the sample size increases? Does it get closer
or farther away from the true population mean in a biological population? Is this
guaranteed to happen as the sample size continues to increase?
As the sample size increases → the standard deviation of the means decreases.
As the sample size increases → the sample mean gets closer to the true population
mean in a biological population.
Yes, according to the law of large numbers, as a sample size grows, its mean gets
closer to true population.
4. Why are considerations of sampling error important?
It is important to consider the sampling error because it tells us the difference
between the sample statistic used to estimate the true population and the actual
parameter whose value is unknown to us.
find more resources at oneclass.com
find more resources at oneclass.com
1. What is the fundamental asymmetry between males and females?
Betimes and triggers theory?
Resource allocation.
Eggs and sperms.
Investment. Investing energy in the offspring. Does it invest a lot or little?
Females invest more in males than offspring.
2. How might this asymmetry lead to different mating behaviors in males
and females? Darwinian fitness?
If you invest little. Whatever children you have you won’t have to invest a
lot in them.
If you invest a huge amount of resources in your offspring, and your
offspring dies after a few years then that is a bad investment.
3. How might elaborate features (colors, scales, plumage) relate to male
mate quality? Good gene hypothesis → could be on the exam.
Good gene hypothesis says that if a selected sexual species invests a lot in
features, can survive better in environments that has large predators.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Circle the correct answer, or provide a short (two word) answer to each question below: there are two hospitals in a town. One of them is smaller than the other. 70% of the babies born a particular day are boys at one hospital and 50% of the babies born on that day were from the other hospital. Answer: 70% is smaller: the true population mean is known. You take a random sample from that population of sample size 10 and another sample of sample size 20. Answer: n=20 will be closer to the true population mean. As the sample size increases the standard deviation of the means decreases. As the sample size increases the sample mean gets closer to the true population mean in a biological population. Whatever children you have you won"t have to invest a lot in them. Good gene hypothesis could be on the exam.
