Which of the following is the traditional source of most oils?
a. single-celled algae
b. crop plants
c. multicellular algae
d. any plants
Answer: b. crop plants
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It has been hypothesized that the whale’s closest living relative is the hippopotamus. Which of the following would constitute the strongest evidence in support of this hypothesis?
a. fossil records b. morphological similarities c. DNA comparisons d. crossbreeding experiments
Estuaries are important nurseries because of the relatively low numbers of predators in these areas
Indicate whether the statement is true or false
Transcription factors account for a greater proportion of the proteome in a fetus compared to a 20-year-old because
A) many cells have already died in a 20-year-old. B) a fetus does not yet need many of its proteins. C) cells are actively differentiating, and many structures are forming in a fetus. D) an adult can carry out more activities than can a fetus.
Which of the following is a micronutrient needed by plants?
a. hydrogen b. potassium c. phosphorus d. sulfur e. chlorine