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