13662435
Descripción
Test por Shamiran C Prater, actualizado hace más de 1 año
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Creado por Shamiran C Prater
hace más de 6 años
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Pregunta 1
Pregunta
Trisomic wheat plants are rare. They have 15 chromosomes. How many chromosomes will normal diploid wheat plants have in their gametes?
Respuesta
-
5
-
7
-
14
-
28
-
none of the above
Pregunta 2
Pregunta
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?
Respuesta
-
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
Pregunta 3
Pregunta
About how many people were killed during WWII?
Respuesta
-
600,000
-
30,000,000
-
60,000,000
-
300,000,000
-
600,000,000
Pregunta 4
Pregunta
Which were the primary sources of immigrants to the US during the immigration boom in the early 1980s?
Respuesta
-
Latin America and Europe
-
Asia and Canada
-
Africa and Asia
-
Africa and Europe
-
Asia and Latin America
Pregunta 5
Pregunta
In terms of sex chromosomes, if Person A is XO and Person B is XXY, which of the following is true?
Respuesta
-
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
Pregunta 6
Pregunta
Which of the following statements is correct?
Respuesta
-
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
Pregunta 7
Pregunta
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)
Respuesta
-
0
-
0.25
-
0.5
-
0,75
-
1
Pregunta 8
Pregunta
Given these birth and death rates, which population is declining the fastest?
Respuesta
-
F
-
P
-
G
-
R
-
Q
Pregunta 9
Pregunta
Which of the following statements about population size is correct?
Respuesta
-
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
Pregunta 10
Pregunta
A pea plant has the genotype TtPp. What percentage of its gametes will be heterozygous?
Respuesta
-
0
-
25
-
50
-
75
-
100
Pregunta 11
Pregunta
Which is always true of a species with a Type III survivorship curve?
Respuesta
-
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
Pregunta 12
Pregunta
What is the world's approximate population today?
Respuesta
-
900 million
-
2 billion
-
4 billion
-
7 billion
-
9 billion
Pregunta 13
Pregunta
AIDS deaths in many sub-Saharan countries have reduced life expectancy at birth by about what percent?
Respuesta
-
10
-
20
-
30
-
40
-
50
Pregunta 14
Pregunta
What percent of their lifespan doe mammals typically spend as juveniles?
Respuesta
-
1-3
-
5-7
-
7-10
-
10-15
-
15-20
Pregunta 15
Pregunta
Which of the following statements is correct?
Respuesta
-
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
Pregunta 16
Pregunta
If a population has an annual growth rate of 2%, how many years would it take for the population to double in size?
Respuesta
-
2
-
15
-
20
-
35
-
none of the above
Pregunta 17
Pregunta
If an individual has the genotype AaCc, how many different genotypes of gametes can it produce?
Respuesta
-
1
-
2
-
3
-
4
-
5
Pregunta 18
Pregunta
Which of the following diseases is responsible for the death of the vast majority of New England in the early 17th century?
Respuesta
-
malaria
-
smallpox
-
influenza
-
measles
-
bubonic plague
Pregunta 19
Pregunta
The age structure of a population is determined primarily by which of the following?
Respuesta
-
birth rate
-
death rate
-
carrying capacity
-
survivorship rate
-
growth rate
Pregunta 20
Pregunta
Obesity reduces life expectancy in the US by about how many years?
Respuesta
-
2
-
4
-
6
-
8
-
10
Pregunta 21
Pregunta
Which of the following statements about gun violence is correct?
Respuesta
-
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
Pregunta 22
Pregunta
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?
Respuesta
-
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
Pregunta 23
Pregunta
If two humans heterozygous for albinism reproduce, what percentage of their children will have normal pigmentation?
Respuesta
-
0
-
25
-
50
-
75
-
100
Pregunta 24
Pregunta
As discussed in class, which of the following was a prime regulator of kangaroos in Australia?
Respuesta
-
myxomatosis virus
-
calicora virus
-
dingoes
-
Tasmanian wolves
-
Cactoblastis virus
Pregunta 25
Pregunta
Which of the following was not used by hunter-gatherer societies as a means of regulating population size?
Respuesta
-
immigration
-
infanticide
-
abstinence
-
abortion
-
the practiced all of these
Pregunta 26
Pregunta
What does it mean epidemics attenuate?
Respuesta
-
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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