最新的WGU Introduction-to-Biology免費考試真題

問題1

A cell is bounded by acell walland has an organelle that performsphotosynthesis. Which type of eukaryotic cell and organelle are described?

A. Animal; ribosome

B. Both plant and animal; mitochondria

C. Plant; chloroplast

D. Animal; Golgi apparatus

正確答案: C

問題2

Which is an example of acovalent bond?

A. One hydrogen atom transfers its electron to another atom

B. A weak electrostatic attraction holds two hydrogen atoms together

C. Two hydrogen atoms each share their single electrons with one another

D. Two hydrogen nuclei fuse to form a single molecule

正確答案: C

問題3

A student notes thatclub mossesform an outgroup, whileferns, gymnosperms, and flowering plantsform an ingroup on a plant cladogram (algal ancestor at the base). Whichbranching pointis the student considering?

A. Leaves with branching veins

B. Seeds

C. Vascular tissue

D. Embryo protection

正確答案: A

問題4

A cell has increased in size and is preparing to divide. Before division, DNA must be replicated.During which stageof the cell cycle is DNA replicated?

A. G#

B. Synthesis

C. Cytokinesis

D. G#

正確答案: B

問題5

A gene sequenceCGCATACGGTACencodes a peptide (Arg-Ile-Arg-Tyr). A mutation inserts aGafter the secondC. How will this most likely affect the phenotype?

A. Affects phenotype; all amino acids after the first will change (frameshift)

B. No effect; only the second amino acid changes

C. Affects phenotype; only the first amino acid changes

D. No effect; protein will be identical

正確答案: A

問題6

Through which process does information flow fromRNA to protein?

A. Translation

B. Transformation

C. Transcription

D. Transposition

正確答案: A

問題7

Refer to theSpecies A-D Cladogram (Node X). What doesNode Xrepresent?

A. The point where species B, C, and D diverged from species A

B. The common ancestor of species A, B, C, and D

C. The point at which species C and D diverged from species B

D. The point at which species C and D diverged

正確答案: D

問題8

Rabbit populations rise and fall over 8-10 years; wolf populations in the same area follow with a ~2-year lag.
What is the relationship between wolves and rabbits?

A. Symbiosis

B. Predator-prey

C. Competition

D. Mutualism

正確答案: B

最新的WGU Introduction to Biology (KBC1, C190) - Introduction-to-Biology免費考試真題

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