AP Bio Review

Which is the best description of a Hydrogen Bond?

• The bond between an oxygen and hydrogen inside of a water molecule

• The bond between two different water molecules because of their slight charges

• The bond any Hydrogen makes

The structural level of a protein least affected by hydrogen bonds is

• primary level

• secondary level

• tertiary level

• all levels are equally affected

Why does increasing producers increase the populations of all trophic levels?

• Producers increase the size of a habitat

• Producers help keep predator populations in check

• With more energy available the carrying capacity increases

• Producers do not have a large impact on population sizes

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What are limiting factors?

• The maximum number of organisms an area can sustain

• Scarce resources that limit the size of a population

• Conditions that limit how much energy flows to the next trophic level

• How diverse the populations of a community are

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Frogs lay ~4000 eggs at a time. Based on this frogs would be classified as -

• R-strategists

• K-strategists

Which of the following would be a density independent limiting factor?

• A virus spreading through a population

• A forest fire burning down a forest

• Birds competing for a limited amount of seeds

• A new predator moving to an area

What will happen if two species occupy the same niche in an ecosystem?

• The ecosystem will be stressed and could collapse

• One species will either alter their niche or be eliminated

• The niche will expand to accommodate both species

• The species will share the niche

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How does competition affect population?

• Most populations do not have competition

• It maximizes the carrying capacity of an ecosystem

• It limits population sizes and drives natural selection

• It benefits both species and increases their populations

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Why are decomposers necessary in ecosystems?

• They recycle essential nutrients back down to producers

• They enrich soil with nitrogen

• They help keep ecosystems clean

• All of the above

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What charge does an atom have when it GAINS electrons?

• Positive

• Negative

• Neutral