Which of the following is an example of adaptation, one of the characteristics of life? 

A. The evolutionary changes that occur to a species
B. Sexual reproduction
C. Organismal organization
D. Metabolism


A. The evolutionary changes that occur to a species

Biology & Microbiology

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While lancelets, members of the lineage ____, live mostly buried in the sand in warm, shallow marine habitats, they

do have well-developed segmented muscles and can move.

a. Petromyzontoidea b. Placodermi c. Cephalochordata d. Urochordata e. Myxinoidea

Biology & Microbiology

Skeletal muscle cells have ____ and are controlled by ____

a. many nuclei; the somatic nervous system b. many nuclei; the autonomic nervous system c. one nucleus each; the autonomic nervous system d. one nucleus each; the somatic nervous system e. two nuclei each; the somatic nervous system

Biology & Microbiology

Many antibiotics cause mispairing between codons and anticodons. What fatal effect would this mispairing have on the cell?

What will be an ideal response?

Biology & Microbiology

Why does an embryo with a balanced translocation have the same chance for normal development that an embryo with a normal karyotype has?

A. The translocation stimulates DNA repair mechanisms to correct the problem before commitment occurs. B. The embryo's somatic cells are unaffected, expressing a normal karyotype; only germline cells express the translocation. C. Although the location of the genetic material is abnormal with a balanced translocation, there are no missing or extra alleles. D. When a zygote with a balanced translocation reaches the embryo stage without a spontaneous abortion, the risk for abnormal development decreases.

Biology & Microbiology