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BIO311D Levin Exam 2 Sp2018

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Quiz on BIO311D Levin Exam 2 Sp2018, created by Shamiran C Prater on 09/05/2018.
Shamiran C Prater
Quiz by Shamiran C Prater, updated more than 1 year ago
Shamiran C Prater
Created by Shamiran C Prater over 6 years ago
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Question 1

Question
Trisomic wheat plants are rare. They have 15 chromosomes. How many chromosomes will normal diploid wheat plants have in their gametes?
Answer
  • 5
  • 7
  • 14
  • 28
  • none of the above

Question 2

Question
Which of these is a correct explanation for how the birth and death rates within a country's population can be equal for many generations, but the number of people in the coutry can still grow?
Answer
  • movement from rural areas to the capitol
  • emigration from other countries
  • immigration from other countries
  • increase in the birth and death rates
  • none of the above

Question 3

Question
About how many people were killed during WWII?
Answer
  • 600,000
  • 30,000,000
  • 60,000,000
  • 300,000,000
  • 600,000,000

Question 4

Question
Which were the primary sources of immigrants to the US during the immigration boom in the early 1980s?
Answer
  • Latin America and Europe
  • Asia and Canada
  • Africa and Asia
  • Africa and Europe
  • Asia and Latin America

Question 5

Question
In terms of sex chromosomes, if Person A is XO and Person B is XXY, which of the following is true?
Answer
  • Both Person A andPerson B are female
  • Both Person A and Person B are male
  • Person A is female and Person B is male
  • Person A is male and Person B is female
  • none of the above

Question 6

Question
Which of the following statements is correct?
Answer
  • About 20% if the US population was born out of the country (ie are immigrants)
  • The rate of growth of the world is declining
  • Developing countries have always been growing faster than developed countries
  • On average, the percentage of juveniles across the world is increasing and the percentage of post-reproductive us decreasing
  • Fertility rates in developing countries (on average) have been constant over the past 30 years

Question 7

Question
If a pea plant with the genotype TTPp crosses with a plant whose genotype is ttPp, what proportion of the offspring will be tall and have purple flowers? (T is tall, P is purple)
Answer
  • 0
  • 0.25
  • 0.5
  • 0,75
  • 1

Question 8

Question
Given these birth and death rates, which population is declining the fastest?
Image:
Exam 2 Table (binary/octet-stream)
Answer
  • F
  • P
  • G
  • R
  • Q

Question 9

Question
Which of the following statements about population size is correct?
Answer
  • All populations of the same species are regulated the same way
  • a single population is regulated the same way all the time
  • populations of different species at the same site are not regulated to the same extent by the same set of regulating factors
  • populations that are introduced a=into distant lands are free of regulation
  • growing populations in size are free of regulation

Question 10

Question
A pea plant has the genotype TtPp. What percentage of its gametes will be heterozygous?
Answer
  • 0
  • 25
  • 50
  • 75
  • 100

Question 11

Question
Which is always true of a species with a Type III survivorship curve?
Answer
  • mortality rates are about the same for all ages across the life span
  • mortality rates are very high early in life
  • survivorship from one age to another increases across the life span
  • populations decline in size as they get older
  • mortality rates are very low in early life

Question 12

Question
What is the world's approximate population today?
Answer
  • 900 million
  • 2 billion
  • 4 billion
  • 7 billion
  • 9 billion

Question 13

Question
AIDS deaths in many sub-Saharan countries have reduced life expectancy at birth by about what percent?
Answer
  • 10
  • 20
  • 30
  • 40
  • 50

Question 14

Question
What percent of their lifespan doe mammals typically spend as juveniles?
Answer
  • 1-3
  • 5-7
  • 7-10
  • 10-15
  • 15-20

Question 15

Question
Which of the following statements is correct?
Answer
  • The generation times of species are inversely correlated with their body sizes
  • age-specific life expectancy within a population is independent of organisms' genotypes
  • population cycles are associated with predator-prey interactions
  • population fluctuations occur only as a result of variation in abiotic factors
  • none of the above

Question 16

Question
If a population has an annual growth rate of 2%, how many years would it take for the population to double in size?
Answer
  • 2
  • 15
  • 20
  • 35
  • none of the above

Question 17

Question
If an individual has the genotype AaCc, how many different genotypes of gametes can it produce?
Answer
  • 1
  • 2
  • 3
  • 4
  • 5

Question 18

Question
Which of the following diseases is responsible for the death of the vast majority of New England in the early 17th century?
Answer
  • malaria
  • smallpox
  • influenza
  • measles
  • bubonic plague

Question 19

Question
The age structure of a population is determined primarily by which of the following?
Answer
  • birth rate
  • death rate
  • carrying capacity
  • survivorship rate
  • growth rate

Question 20

Question
Obesity reduces life expectancy in the US by about how many years?
Answer
  • 2
  • 4
  • 6
  • 8
  • 10

Question 21

Question
Which of the following statements about gun violence is correct?
Answer
  • The gun homicide rate in Texas is the highest in the US
  • the gun homicide rate in the US is more than 6 times higher than in France
  • Background checks on gun buyers have no effect on homicide rates
  • none of the above

Question 22

Question
The brain cancer rte in Romania is twice that of the US. Female Romanians who migrate to the US have a brain cancer rate twice that of American females. The daughters of Romanian immigrants have the same brain cancer rate as their mothers. Which of the following can we conclude?
Answer
  • cancer rates are influenced almost exclusively by environmental factors
  • cancer rates are influenced almost exclusively by genetic factors
  • cancer rates are influenced equally by genetic and environmental factors
  • cancer is linked to migration
  • none of the above

Question 23

Question
If two humans heterozygous for albinism reproduce, what percentage of their children will have normal pigmentation?
Answer
  • 0
  • 25
  • 50
  • 75
  • 100

Question 24

Question
As discussed in class, which of the following was a prime regulator of kangaroos in Australia?
Answer
  • myxomatosis virus
  • calicora virus
  • dingoes
  • Tasmanian wolves
  • Cactoblastis virus

Question 25

Question
Which of the following was not used by hunter-gatherer societies as a means of regulating population size?
Answer
  • immigration
  • infanticide
  • abstinence
  • abortion
  • the practiced all of these

Question 26

Question
What does it mean epidemics attenuate?
Answer
  • the percentage of afflicted individuals that die decreases over time
  • the number of afflicted individuals that die increases over time
  • the pathogen population size decreases over time
  • individuals increase their immunity from one generation to another
  • none of the above
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