Bio 182 Exam 3 Questions with Correct

Bio 182 Exam 3 Questions with Correct Answers 100% Verified

• The population reached its carrying capacity in 2007. - Correct Answer False

During 1995-2002, the number of births likely exceeded the number of deaths. - Correct Answer True Between 1996 and 1999, the death rate in the population could have exceeded the birth rate if immigration from other populations increased greatly. - Correct Answer True Between 1988 and 2007, the rate of death could have exceeded the rates of birth and immigration if emigration to other populations increased steadily. - Correct Answer False The growth of the population between 1998 and 2007 can be adequately described by an exponential model. - Correct Answer True

• The two species have completely different fundamental niches (no overlap). - Correct Answer False

7 An increase in the number of species 2 likely contributed to the decline in species 1. - Correct Answer True An increase in competition within species likely contributed to the decline in species 1. - Correct Answer True A mutation in species 1 that causes its fundamental niche to diverge from the fundamental niche of species 2 could increase the fitness of species 1. - Correct Answer True Both species will likely coexist in a lake that has cool water but a low concentration of oxygen. - Correct Answer False

• Since the brown tree snake is a keystone species in Guam, it must also be a keystone species in

Australia. - Correct Answer False 1 / 2

Native predators of birds on Guam likely decreased in abundance after brown tree snakes arrived. - Correct Answer True If birds on Guam usually disperse seeds, brown tree snakes likely had a negative indirect effect on plants. - Correct Answer True Since more prey and fewer predators occur on Guam than in Australia, the density of brown tree snakes in Guam likely exceeds the density in Australia. - Correct Answer True If some of the extinct species of lizards used to eat bird eggs, brown tree snakes had a positive direct effect, though still exhibits a negative indirect effect, on birds. - Correct Answer False

• All of the nitrogen in fertilizers will end up in bodies of water. - Correct Answer False

If the supply of nitrogen limits the growth of plants, emissions from burning fossil fuels should lead to more biomass of plants. - Correct Answer True A teleconnection occurs when nitrogen introduced as fertilizer ends up causing algae to bloom in the ocean. - Correct Answer True Negative feedback would occur if emissions of fossil fuel increase the rate of nitrification by bacteria.

• Correct Answer False

Positive feedback occurs when nitrification by bacteria causes the population of bacteria to grow. - Correct Answer True

• Burning more coal would likely increase the amount of methane trapped as ice in Earth's oceans.
• Correct Answer False

If global warming causes methane to escape from ice, warming will accelerate through positive feedback. - Correct Answer True Some of the carbon dioxide that results from the reaction of methane and water will end up in the tissues of plants. - Correct Answer True

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