ATI TEAS 7
Biology
1. Homologous structures are those that:
- A. Have the same function but different origins
- B. Have different functions but the same origin
- C. Are similar in appearance and function due to shared ancestry
- D. Are identical in both appearance and function
Correct answer: C
Rationale: Rationale: - Option A is incorrect because structures with the same function but different origins are analogous structures, not homologous structures. - Option B is incorrect because structures with different functions but the same origin are also not homologous structures; they are considered to be vestigial structures. - Option D is incorrect because structures that are identical in both appearance and function are not necessarily homologous; they could be the result of convergent evolution. Homologous structures are those that share similarities in appearance and function due to being inherited from a common ancestor. These structures may have undergone modifications over time to adapt to different functions in different species, but their fundamental similarities can be traced back to a shared evolutionary history.
2. What property of a substance refers to its ability to be drawn into thin wires without breaking?
- A. Malleability
- B. Viscosity
- C. Ductility
- D. Conductivity
Correct answer: c
Rationale: Ductility is the property that describes a substance's ability to be drawn into thin wires without breaking.
3. Which of the following sentences uses the most formal language?
- A. The movie was awesome!
- B. The film did not meet my expectations.
- C. I found the cinematic experience to be unsatisfactory.
- D. The flick was pretty bad.
Correct answer: C
Rationale: The sentence uses more complex vocabulary ("cinematic experience") and avoids slang ("awesome," "flick").
4. What is the building block of RNA?
- A. Amino acid
- B. Nucleotide
- C. Protein
- D. Fatty acid
Correct answer: B
Rationale: Rationale: A) Amino acid: Amino acids are the building blocks of proteins, not RNA. B) Nucleotide: Nucleotides are the building blocks of RNA. A nucleotide consists of a nitrogenous base (adenine, guanine, cytosine, or uracil in RNA), a sugar (ribose in RNA), and a phosphate group. C) Protein: Proteins are made up of amino acids, not nucleotides. D) Fatty acid: Fatty acids are components of lipids, not RNA.
5. A bag contains 5 red marbles and 7 blue marbles. If you draw a marble without looking, what is the probability it will be red?
- A. 1/4
- B. 1/3
- C. 1/2
- D. 2/3
Correct answer: A
Rationale: Divide the number of red marbles (5) by the total number of marbles (12) to get 1/3 probability.
6. Identify the noun in the following sentence: The aroma of freshly baked bread filled the kitchen.
- A. filled
- B. kitchen
- C. aroma
- D. freshly
Correct answer: C
Rationale: Nouns name people, places, things, or ideas. "Aroma" names a specific type of smell.
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