Study Guide for Finals: 4/31/25

The evolution of beak sizes/shapes in birds on different islands is a response to...

• A. the nutritional content of the seeds on each island

• B. the types of food available in their environment

• C. whether the populations interbreed

• D. no change

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Fats, oils, and cholesterol are all types of

• cell membranes

• hormones

• lipids

• fatty acids

Which of the following statements about enzymes is NOT true?

• A. enzymes work best at the same pH

• B. all enzymes have specific shapes that match their substrates

• C. enzymes are proteins

• D. the shape of an enzyme allows it to do its job

What nucleotide in DNA replication is going to be added at point 1, opposite from thymine?

• adenine

• thymine

• cytosine

• guanine

In feeding relationship models like food chains and food webs, the arrow points in the direction of

• who got eaten

• who gives energy

• producers

• energy flow

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According to the diagram of water on planet Earth, the majority of water on planet Earth can be found in...

• In ice caps and glaciers

• In lakes

• In groundwater

• In oceans

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Which of these best describes the relationship shown by this Kelp Forest Ecosystem Pyramid?

• The Giant Sea Bass is a predator of the Sheephead

• The Giant Sea Bass is the prey of the Sheephead

• Sea Urchins are the prey of the kelp

• Sheepheads are the predators of the Giant Sea Bass

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What did Charles darwin think about natural selection?

• organisms change their traits to the trait that will help them
• breeding 2 similar animals get the best traits
• breeding 2 animals with different traits give the best results
• organisms with better traits for their environment will survive and reproduce

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What is an adaptation?

• A temporary change in an organism's behavior

• A genetic trait that improves an organism's ability to survive and reproduce

• The process by which a species splits into two or more species

• A random change in the DNA of an organism

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Which of the following best describes natural selection?

• The process by which individuals with beneficial traits produce more offspring

• The random change in allele frequency over time

• The development of new species from existing species

• The preservation of fossils over geological time

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