Test
BIO311D Levin Exam 2 Sp2018
Preguntas del test (26)
1Trisomic wheat plants are rare. They have 15 chromosomes. How many chromosomes will normal diploid wheat plants have in their gametes?
- A5
- B7
- C14
- D28
- Enone of the above
2Which 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?
- Amovement from rural areas to the capitol
- Bemigration from other countries
- Cimmigration from other countries
- Dincrease in the birth and death rates
- Enone of the above
3About how many people were killed during WWII?
- A600,000
- B30,000,000
- C60,000,000
- D300,000,000
- E600,000,000
4Which were the primary sources of immigrants to the US during the immigration boom in the early 1980s?
- ALatin America and Europe
- BAsia and Canada
- CAfrica and Asia
- DAfrica and Europe
- EAsia and Latin America
5In terms of sex chromosomes, if Person A is XO and Person B is XXY, which of the following is true?
- ABoth Person A andPerson B are female
- BBoth Person A and Person B are male
- CPerson A is female and Person B is male
- DPerson A is male and Person B is female
- Enone of the above
6Which of the following statements is correct?
- AAbout 20% if the US population was born out of the country (ie are immigrants)
- BThe rate of growth of the world is declining
- CDeveloping countries have always been growing faster than developed countries
- DOn average, the percentage of juveniles across the world is increasing and the percentage of post-reproductive us decreasing
- EFertility rates in developing countries (on average) have been constant over the past 30 years
7If 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)
- A0
- B0.25
- C0.5
- D0,75
- E1
8Given these birth and death rates, which population is declining the fastest?
- AF
- BP
- CG
- DR
- EQ
9Which of the following statements about population size is correct?
- AAll populations of the same species are regulated the same way
- Ba single population is regulated the same way all the time
- Cpopulations of different species at the same site are not regulated to the same extent by the same set of regulating factors
- Dpopulations that are introduced a=into distant lands are free of regulation
- Egrowing populations in size are free of regulation
10A pea plant has the genotype TtPp. What percentage of its gametes will be heterozygous?
- A0
- B25
- C50
- D75
- E100
11Which is always true of a species with a Type III survivorship curve?
- Amortality rates are about the same for all ages across the life span
- Bmortality rates are very high early in life
- Csurvivorship from one age to another increases across the life span
- Dpopulations decline in size as they get older
- Emortality rates are very low in early life
12What is the world's approximate population today?
- A900 million
- B2 billion
- C4 billion
- D7 billion
- E9 billion
13AIDS deaths in many sub-Saharan countries have reduced life expectancy at birth by about what percent?
- A10
- B20
- C30
- D40
- E50
14What percent of their lifespan doe mammals typically spend as juveniles?
- A1-3
- B5-7
- C7-10
- D10-15
- E15-20
15Which of the following statements is correct?
- AThe generation times of species are inversely correlated with their body sizes
- Bage-specific life expectancy within a population is independent of organisms' genotypes
- Cpopulation cycles are associated with predator-prey interactions
- Dpopulation fluctuations occur only as a result of variation in abiotic factors
- Enone of the above
16If a population has an annual growth rate of 2%, how many years would it take for the population to double in size?
- A2
- B15
- C20
- D35
- Enone of the above
17If an individual has the genotype AaCc, how many different genotypes of gametes can it produce?
- A1
- B2
- C3
- D4
- E5
18Which of the following diseases is responsible for the death of the vast majority of New England in the early 17th century?
- Amalaria
- Bsmallpox
- Cinfluenza
- Dmeasles
- Ebubonic plague
19The age structure of a population is determined primarily by which of the following?
- Abirth rate
- Bdeath rate
- Ccarrying capacity
- Dsurvivorship rate
- Egrowth rate
20Obesity reduces life expectancy in the US by about how many years?
- A2
- B4
- C6
- D8
- E10
21Which of the following statements about gun violence is correct?
- AThe gun homicide rate in Texas is the highest in the US
- Bthe gun homicide rate in the US is more than 6 times higher than in France
- CBackground checks on gun buyers have no effect on homicide rates
- Dnone of the above
22The 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?
- Acancer rates are influenced almost exclusively by environmental factors
- Bcancer rates are influenced almost exclusively by genetic factors
- Ccancer rates are influenced equally by genetic and environmental factors
- Dcancer is linked to migration
- Enone of the above
23If two humans heterozygous for albinism reproduce, what percentage of their children will have normal pigmentation?
- A0
- B25
- C50
- D75
- E100
24As discussed in class, which of the following was a prime regulator of kangaroos in Australia?
- Amyxomatosis virus
- Bcalicora virus
- Cdingoes
- DTasmanian wolves
- ECactoblastis virus
25Which of the following was not used by hunter-gatherer societies as a means of regulating population size?
- Aimmigration
- Binfanticide
- Cabstinence
- Dabortion
- Ethe practiced all of these
26What does it mean epidemics attenuate?
- Athe percentage of afflicted individuals that die decreases over time
- Bthe number of afflicted individuals that die increases over time
- Cthe pathogen population size decreases over time
- Dindividuals increase their immunity from one generation to another
- Enone of the above
Información
- Descripción
- Test sobre BIO311D Levin Exam 2 Sp2018, creado por Shamiran C Prater el 09/05/2018.
- Autor
- Shamiran C Prater
- Idioma
- English
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