Unit Test Answers

Scientists group organisms into kingdoms by looking at specific characteristics. Thermus aquaticus, shown below, is a specialized bacteria called a thermophile. Thermophiles are microorganisms that can live in bodies of water that are extremely hot, such as deep sea hydrothermal vents.Which characteristic most likely describes a mushroom but not Thermus aquaticus?

Which example best demonstrates the importance of having knowledge of evolutionary relationships?

Which kingdom(s) include both unicellular and multicellular organisms?

Dichotomous keys are constructed based on

A scientist has correctly gone through all the possible steps in a dichotomous key, but has not identified an insect. Which most likely describes why he did not identify the insect?

When a plant produces sugars and transports them during translocation, which main plant tissues are at work?

Which level of classification contains orders but is smaller than phylum?

Which is the correct written form of the scientific name that uses the rules of binomial nomenclature?

Cacti typically grow in very dry climates with infrequent rainfall. When it does rain, the rain usually only penetrates a few inches into the soil. Which adaptation is most likely to help a cactus survive in the dry climate?

What do sclerenchyma and collenchyma have in common?

Which level of biological classification is the lowest level that butterflies (invertebrates) and dogs (vertebrates) have in common?

Which statement best describes the difference between xylem and phloem?

Which question is most likely to be found in a dichotomous key for identifying a tree by its leaves?

Consider the recent phylogenetic tree of five different organisms. Old classification systems based on physical characteristics would most likely disagree with the relationship between which two animals in the tree?

Use this portion of a dichotomous key for tree identification to answer the question.1a. Needlelike leaf ® Step 101b. Broad leaf ® Step 22a. Compound leaf ® Step 32b. Simple leaf ® Step 77a. Leaf bases attached opposite each other on branch ® Step 87b. Leaf bases attached staggered on branch ® Step 118a. Leaves lobed ® Maple8b. Leaves not lobed ® Step 99a. Leaves heart shaped ® Catalpa9b. Leaves not heart shaped ® DogwoodWhich best describes dogwood leaves?