Trisomic wheat plants are rare. They have 15 chromosomes. How many chromosomes will normal diploid wheat plants have in their gametes?
5
7
14
28
none of the above
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?
movement from rural areas to the capitol
emigration from other countries
immigration from other countries
increase in the birth and death rates
About how many people were killed during WWII?
600,000
30,000,000
60,000,000
300,000,000
600,000,000
Which were the primary sources of immigrants to the US during the immigration boom in the early 1980s?
Latin America and Europe
Asia and Canada
Africa and Asia
Africa and Europe
Asia and Latin America
In terms of sex chromosomes, if Person A is XO and Person B is XXY, which of the following is true?
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
Which of the following statements is correct?
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
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)
0
0.25
0.5
0,75
1
Given these birth and death rates, which population is declining the fastest?
F
P
G
R
Q
Which of the following statements about population size is correct?
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
A pea plant has the genotype TtPp. What percentage of its gametes will be heterozygous?
25
50
75
100
Which is always true of a species with a Type III survivorship curve?
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
What is the world's approximate population today?
900 million
2 billion
4 billion
7 billion
9 billion
AIDS deaths in many sub-Saharan countries have reduced life expectancy at birth by about what percent?
10
20
30
40
What percent of their lifespan doe mammals typically spend as juveniles?
1-3
5-7
7-10
10-15
15-20
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
If a population has an annual growth rate of 2%, how many years would it take for the population to double in size?
2
15
35
If an individual has the genotype AaCc, how many different genotypes of gametes can it produce?
3
4
Which of the following diseases is responsible for the death of the vast majority of New England in the early 17th century?
malaria
smallpox
influenza
measles
bubonic plague
The age structure of a population is determined primarily by which of the following?
birth rate
death rate
carrying capacity
survivorship rate
growth rate
Obesity reduces life expectancy in the US by about how many years?
6
8
Which of the following statements about gun violence is correct?
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
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?
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
If two humans heterozygous for albinism reproduce, what percentage of their children will have normal pigmentation?
As discussed in class, which of the following was a prime regulator of kangaroos in Australia?
myxomatosis virus
calicora virus
dingoes
Tasmanian wolves
Cactoblastis virus
Which of the following was not used by hunter-gatherer societies as a means of regulating population size?
immigration
infanticide
abstinence
abortion
the practiced all of these
What does it mean epidemics attenuate?
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
Please wait - loading…