Which of the following statements is true? The shape of DNA is a triple helix. DNA mutations never affect an entire chromosome. Mutations in egg and sperm cells are inherited by offspring. Reginald Punnett discovered patterns of inheritance during pea plant experiments.

Which of the following is not a characteristic of carnosaurs? a. long narrow skulls b. strong forelimbs c. horn projecting from their skulls d. none of the above

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion