Practice MC Test #1
All the recolonizing species use which of the following processes to acquire food?
Photosynthesis
Which of the following organisms has the largest biomass in this food chain?
Phytoplankton
Which of the following would have the biggest impact on achieving global sustainability?
Reducing human population size
In the course of using chemical pesticides, such as DDT, it was observed that certain species of insects which has not previously earned significant harm became serious pests. This phenomenon is known as
Resurgence
Whic hstatement below best explains why the mountain became 1/2 the size as it was millions of years ago
Wind and water could have broken down the solid rock of the mountain gradually everyday which after millions of years could have made the mountain 1/2 the height it used to be
Prior to the 1650s, the wood bison pop in North America remained close to the carrying capacity of its habitat. The generalized growth curve and the reproductive strategy of the wood bison were respectivly
an S curve and K selection
Region that contains the majority of molecules in the atm.
Troposphere
Region that largely responsible for the weather at Earth's surface
Troposphere
If excessive amounts of water are discharged into a lake, the immediate result will most likely be
A decrease in the amount of dissolved oxygen
Clouds usually form when
Air temperature reaches dewpoint
Resistance can occur in pests with repeated pesticide use. A similar situation can happen with
Antibiotic use and bacterial infection
Most of the nitrogen in forest soil normally comes from
Bacteria that carry out nitrogen fixation
Which of the following statements is the main reason why any place at the equator is much warmer than the North Pole?
Because the sun is more directly overhead at the equator than at the North Pole, the sun light is more intense
A pesticide, DDT
Biomagnification
Below are age structure diagrams of 3 pops. Which pyramids show slow growth
C
A greenhouse gas that is exclusively anthropogenic
CHl2F2
A disease kills all of the robins in this area. It does not kill any other plants or animals. If the size of the fox population stays the same, which pop of organism will increase after the robins die?
Caterpillars
Which statement best explains the difference in average yearly temp. range for the 2 cites?
City B is located near a large body of water
Grazing by wood bison provides more sustainable digging conditions for prairie dogs
Commensalism
In which biome would you find plants that are deep, dark green growing in relatively rich soil?
Coniferous Forest
In the figure below, which of the following survivorship curves most applies to humans living in developed countries?
Curve A
In the figure for #43, which of the following survivorship curves most applied to plant species?
Curve C
Events that take place in a biomate are shown in the diagram below. Which of the following processes are best represented by the diagram?
Decomposers release a material that is acted on by other organisms
Hunting of the bison for meat and hides by the First Nations people helped maintain the bison population near the carrying capacity of its habitat by increasing the
Environmental Resistance
Which choice below is an example of a marine ecosystem?
Estuary
Which is an organic compound found in most cells?
Glucose
The most abundant nonanthropogenic greenhouse gas
H2O
Which of the following organisms in this population are secondary consumer
Herring
Which assumptions have to be made when applying the mark recapture estimate of population size?
I, II, III
Scientists believe the decrease in salmon population in south central asia is caused by the Northern pike's
Immigration, causing an increase in mortality
Most organisms were unable to live in the area for the first 6 months after the eruption. Which of the following changes are most likely needed to occur in the area so that organisms could return there?
Increase in soil nutrients
Elk and deer compete with wood bison for food and living space
Interspecific competition
Smaller wood bison compete with larger wood bison for food and living space
Intraspecific competition
Nitrogen is one of the most important components of fertilizer. The other two major components of fertilizer are
K and P
The most significant reason for loss of N in the soil is
Leaching
The scientists predicted that trees in the Fabaceae group, (also called Leguminosae or bean and pea family) could be negatively impacted by an increase in soil nitrogen because they...
Lose their competitive advantage as nitrogen-fixation
A logical conclusion that can be drawn from the graphs above is developed countries have
Lower infant mortality rates and a higher life expectancy
Toxins found in the food chain are magnified as you go to higher and higher trophic levels. This is because...
Many toxins are not cleared from tissues, so each animals that eats another retains a relatively small % of the carbon, Nitrogen, but 100% of the toxins
Which of the following is REQUIRED for the process of natural selection to occur?
Members of the same species must compete with one another
The side diagram shows undisturbed sedimentary strata at the bottom of an ocean. The fossils found in layer b resemble the fossils found in layer A. This suggests that
Modern forms of life may have evolved from earlier forms of life
Pioneer species are the first species to take hold in a barren area after a disaster has occured. Based on the data, most of the pioneer species in this area were which of the following types of organisms?
Mosses
Most of the nitrogen in the world is found as ______ in the ______
N2 ... Atmosphere
Many wood bison are infected with tuberculosis or brucellosis bacteria
Parasitism
The process in which pioneer organisms colonize bare substrate rock, glacial till, or sand is known as
Primary Succession
The recolonization of this area by algae, mosses, ferns and seed plants reestablished which tropic level in the devastated ecosystem?
Producer
An example of a biological control againsts insects is the use of
Sex hormones
Which of the following statements is true about Place 1 compared to Place 2 on any day of the year?
Some times of the year the number of hours of daylight is higher at Place 2, but the max intensity of sunlight during a day is always higher at Place 2 than Place 1
Which radioactive isotope was used to establish the geological time scale?
Starch and Cellulose
Region where the majority of the protective ozone layer is located
Stratosphere
Which is biotic factor operating within an ecosystem?
The carnivores that consume other animals
How do plants utilize the nitrogen that is absorbed?
The nitrogen is used to built proteins
A new species that eats only foxes becomes part of this food web. using only the relationships between the plants and animals shown in the diagram below right which of the following could happen because of this change?
The number of robins could increase, and the number of caterpillars could decrease
The best explanation for the above mentioned phenomenon is that
The pesticide killed of predators which had previously held this species in check
If the herring population is reduced by predation, which of the following is most likely to occur in this aquatic ecosystem?
The phytoplankton population will be reduced over the next year
Which of the following will occur if the trend of global temp. increase continues?
The troposphere will contain more water vapor
Region with the lowest atmospheric pressure
Thermosphere
Predatory insects are likely to be more severely affected by pesticide treatments than the plant-eating insects because
They receive a higher dose through the food chain
In which biome would you find, epiphytes, lianas, and understory plants with large leaf surfaces?
Tropical rainforest
The cross section below represents a prevailing wing flow that causes different climates on the windward and leeward sides of a mountain range. Compared to the temperature and moisture of the air rising on the windward side, the temperature and moisture of the air descending at the same altitude on the leeward side will be:
Warmer and drier
Which pair of compounds can be classifies as inorganic
Water and Salts
Which of the following statements is false? Pesticides used in the 1800s' and early 1900's
Were synthetic organic chemicals
In which biome would you expect to find either; corn, soybeans, wheat or cattle
X
Can the proportion of individuals with certain traits in a population change because the environment changes?
Yes, when the environment changes, individuals with certain inherited traits survive and reproduce
Which biome has little precipitation, shallow roots, is very fragile and has a very short growing season?
Z