What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 14, Problem 13MC
Summary Introduction
Introduction:
A population pyramid or age pyramid gives the number of individuals in different age groups.
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All of the following conclusions can be made about the population represented in the above age pyramid EXCEPT
Select one:
a. the wide base indicates a high birth rate
b. death rates are only high in extreme old age
c. the steep sides show the death rate is high for both the young and adults
d. life expectancy is low with few people reaching old age
Which of the following accurately describes a trophic cascade?
a. Sunflower stars, as a primary predator within Northern California bull kelp forests, have an indirect positive impact on the sea
urchin's main prey, the bull kelp.
b. Sunflower stars, as a primary predator within Northern California bull kelp forests, have an direct positive impact on the sea
urchin's main prey, the bull kelp.
c. Sunflower stars prey directly on kelp and keep kelp populations in check.
d. The presence of Pisaster sea stars benefits Mytilus mussels, a primary producer.
The graph shows the worldwide human population from 1950 to 2050. Data for the future years are predictions.
According to the ideas of Thomas Malthus, what are the predicted changes to the human population after 2050?
A.
The population would continue to increase at the same rate, due to constant food supplies.
B.
The population would increase more rapidly, due to advances in technology.
C.
Eventually the population would stop increasing or would decrease, due to lack of food and living space.
D.
Eventually the population would decrease to zero, because of war, famine, or disease.
Chapter 14 Solutions
What is Life? A Guide to Biology with Physiology
Ch. 14 - Prob. 1SACh. 14 - Prob. 2SACh. 14 - Prob. 3SACh. 14 - Prob. 4SACh. 14 - Prob. 5SACh. 14 - Prob. 6SACh. 14 - Prob. 7SACh. 14 - Prob. 8SACh. 14 - Prob. 9SACh. 14 - Prob. 10SA
Ch. 14 - Prob. 11SACh. 14 - Prob. 12SACh. 14 - Prob. 13SACh. 14 - Prob. 14SACh. 14 - Prob. 15SACh. 14 - Prob. 1MCCh. 14 - Prob. 2MCCh. 14 - Prob. 3MCCh. 14 - Prob. 4MCCh. 14 - Prob. 5MCCh. 14 - Prob. 6MCCh. 14 - Prob. 7MCCh. 14 - Prob. 8MCCh. 14 - Prob. 9MCCh. 14 - Prob. 10MCCh. 14 - Prob. 11MCCh. 14 - Prob. 12MCCh. 14 - Prob. 13MCCh. 14 - Prob. 14MCCh. 14 - Prob. 15MC
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- Which of the following statements about exponential growth is FALSE? O a. Increases in the size of the population do not affect per capita rate of increase (r). Ca. b. Exponential growth adds a constant number of individuals per unit time to a population as N gets larger. C. In reality, it is not possible for exponential population growth to continue indefinitely. d. In an exponentially growing population, the % increase of the population per unit * time doesn't depend on the number of individuals (N) in the population.arrow_forwardGrowth rate of a population is determined by: A. The increase in the number of people per unit of time. B. The number of people being born minus the number of people dying. C. The number of children living per each two adults. D. The number of people times the number of children each one has per year.arrow_forwardWhich statement about environmental stochasticity is true? O A. Environmental stochasticity places grizzly bears in Yellowstone National Park at risk for extinction despite the average positive growth rate of this population. O B. There is no fundamental difference between environmental stochasticity and demographic stochasticity. O C. In a situation of environmental stochasticity, the underlying birth and death rates of individuals are constant across years. D. All of the above E. None of the abovearrow_forward
- Alyce is studying populations and how they grow. She has a population of goldfish that she's been observing. Alyse hypothesizes that the birth rate and death rate are related to the growth rate of the population. Is she correct? Choose the best answer. O a. Yes, the growth rate is equal to the birth rate minus the death rate O b. No, the birth rate and death rate are completely separate from growth rate O c. Yes, the birth rate plus death rate is equal to the growth rate O d. No, the growth rate is equal to only birth ratearrow_forwardWhat measurement could you use to best determine if a population is better adapted to its environment for their particular life pattern? a Increased population growth rate b Zero population growth c Decreased death rates d Increased birth ratesarrow_forwardWhat is the purpose of age pyramids? Select one: a. It is useful in determining whether a population is at carrying capacity or not. b. It is used to compare exponential or logistic growth rate. c. It is a useful tool to predict the future population size of a region. d. It helps to determine whether the population is K-selected or r-selected.arrow_forward
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