Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Bio 118 Exam 4
flashies
| Question | Answer |
|---|---|
| Which of the following occurs after the creation of a new allele? | The gene pool becomes more diverse. |
| Which of the following is an example of behavioral isolation? | Female spiders only mate when a male of the same species taps her web in a particular way. |
| What prevents mules from having offspring? | They can't produce sperm and eggs |
| Apple maggot flies appear to be two separate races. What makes these races different? | They have different allele frequencies. |
| How does polyploidy cause reproductive isolation? | It alters the number of chromosomes in sex cells. |
| Which one of the following shows the steps of speciation in the correct order? | geographic isolation, evolutionary changes, reproductive isolation |
| One species of plant produces flowers when nights are 10 hours long. A related species comes into flower when nights are 9 hours long. This is an example of | temporal isolation. |
| Which of the following organisms would you expect to most readily become reproductively isolated, even in the absence of geographic isolation? | grasses |
| The hypothesis of punctuated equilibrium suggests that | there have been short periods of dramatic evolutionary change separated by long periods of no change. |
| You're studying two species of frog. How would you know if gradualism or punctuated equilibrium played a role in the formation of the two species from their common ancestor? | The degree of difference depends less on the mechanism of speciation than on the time that's passed since speciation occurred. |
| You work for an insecticide company that's looking for a molecule that will attract wasps into traps. In which kingdom will you look first? | Plants |
| How do fungi obtain nutrients? | secreting chemicals that break down food and then absorbing it |
| In what way are fungi similar to animals? | Both take in food from the outside. |
| Plants possess many compounds that affect animals. Which of the following is the most likely reason? | Plants that produce chemical defenses were successful against plant-eating animals. |
| An organism is described that can live in very high temperature water. This organism is most likely a member of the | Archaea domain. |
| Life on Earth is approximately | 3.6 billion years old |
| The Cambrian explosion is a period in Earth's history when what significant event occurred? | multicellular animals first appeared |
| Why would bioprospectors be interested in animals that produce venom? | Venoms often interact with nerves, so at much reduced concentrations, they could act as painkillers. |
| What is the result of adaptive radiation? | the diversification of one or a few species into a varied group of descendants |
| To which group is Fungi most closely related? | Animalia |
| Which of the following is the best way to test a hypothetical evolutionary classification among living organisms? | analysis of DNA sequence |
| With the evolution of ________, plants were able to grow taller. | vascular tissue |
| The most important ecological role of bacteria is | as decomposers. |
| What is the adaptive value of natural antibiotic production by fungi? | Bacteria are the main competitors of fungi for food. |
| Which of these most accurately describes a single population? | all the oak trees in a park |
| the cardinal flower, three different times. You find each stand of cardinal flower, including many flowers in each stand, on a stream bank. This is an example of a ____ distribution. | clumped |
| A population that's exhibiting exponential growth | will have growth proportional to the current total. |
| In a particular county, there are 30 births and 20 deaths for every 1000 residents. What is the annual growth rate of this population? | 1.00% |
| In some situations, the death rate of a population declines before the birth rate begins to decline. This is an example of | demographic transition. |
| Population spacing is called ________, and population density is called ________. | distribution; abundance |
| All the bacteria of the species E. coli that live inside a cow's intestine represent a(n) | population |
| All the following must be assumptions of the mark-recapture method EXCEPT | the population size changes dramatically between the time of mark and recapture. |
| When you look at the spacing of humans on a global level, the population follows a(n) ________ distribution. | clumped |
| Exponential growth, when graphed, appears as | a J curve |
| All the following explain a clumped distribution of individuals in a population EXCEPT | territoriality in a species of bird. |
| Although the carrying capacity of a population is determined by food availability, it is also dependent on all the following EXCEPT | the choice by women not to have children |
| All the following are directly involved in calculating net primary productivity EXCEPT | the amount of chemical energy required by plants to support themselves |
| Which of the following is a density-dependent factor? | increase in waste production |
| As the size of a population approaches the carrying capacity of its environment, all the following are true EXCEPT | birth rates become proportionally much greater than the death rates. |
| A population has reached the carrying capacity of the environment when | the environment can't support a further increase in the population. |
| When a population of spotted salamanders in a vernal pool remains stable for many years and the population has stabilized because of resource limits, | carrying capacity has been reached. |
| Increased mortality in a population due to increased competition for water is an example of | the effect of a density-dependent factor. |
| Which of the following is a population unaffected by density-dependent factors? | bacteria kept in a culture that has its nutrients constantly replenished |
| At which time did the global human population start to exhibit obvious and dramatic exponential growth, with a growth rate of 2% (or more) per year? | 250 years ago |
| On a graph of population change over a period of time, exponential growth is represented by | a steep, nearly vertical segment. |
| One problem associated with using NPP to calculate the carrying capacity for humans is that | it fails to take into account our need for other resources, such as water, clean air, and fuel. |
| The principle of a carrying capacity corresponds to a pattern of population growth that's | logistic. |
| An ecological population of organisms would include all | students in a classroom. |
| All the following experiments would be considered an ecological study EXCEPT | the effect of a hormone on the rate of blood vessel formation. |
| Which of the following is at the bottom of a trophic pyramid? | producers |
| The average lifespan of a species on Earth is estimated to be ________ years. | 1 million |
| What is the estimated background rate of extinction, as calculated by scientists? | 0.0001% per year |
| All the following are examples of extinct or nearly extinct animals in the United States EXCEPT | stripped skunks |
| Scientists have used the fossil record to estimate the average length of time that a species inhabits the Earth. This estimate is useful for assessing the impact of humans on the Earth's biological diversity because it can | estimate how many species extinctions are caused by human activity. |
| Corn (maize) that's grown commercially is probably ________ teosinte, a wild grass in Mexico from which corn was originally domesticated. | less genetically diverse than |
| Extracts of the rosy periwinkle, Catharus roseus, have provided medicine with vincristine and vinblastine, drugs now available for treating cancer. The ability to find this species of plant and discover these drugs is a strong argument for | preserving biodiversity. |
| some poultry producers infect the intestinal tract of hens with a harmless bacteria, resulting in a dramatic decrease of S. enteritidis found in the chickens. In this case, the producers have used the principle of | competitive exclusion. |
| Repeated use of antimicrobial soaps results in reduction of the diversity of bacteria to a small number of species that are resistant to the chemicals in the soap. Is this event likely to be a good thing, a bad thing, or neutral? | A bad thing; if the competitors of a resistant pathogen are eliminated by the antimicrobial soap, the pathogenic bacteria may proliferate and become a health risk. |
| Which of the following represents the ecological niche of an organism? | the predation on mice by a snake |
| What is the main use for kudzu? | Prevent soil erosion |
| Where is kudzu originally from? | Japan |
| Under ideal conditions how many feet can kudzu grow in a year? | 60 feet |
Created by:
katlynnee