The white chalk cliffs of Dover, England are composed mainly of the remains of ________
a. foraminiferans
b. radiolarians
c. dinoflagellates
d. charophytes
a
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Which of the following are the best examples of homologous structure?
a. The finger bones found in humans, bats, and whales b. Wings in both birds, bats, and bees c. Beaks of birds and squid d. The streamlined, hydrodynamic bodies of both dolphins and sharks
Which of the following observations led to Darwin's major inferences?
a. Members of a population vary in their heritable traits b. Body parts that are not used deteriorate over time c. Organisms only go extinct when catastrophes occur d. Although organisms can produce huge numbers of offspring, many of these offspring do not survive e. The first and fourth answers are correct
Contraction of leg muscles aid in the function of which system?
a. digestive b. cardiovascular c. respiratory d. nervous e. endocrine
Which animals have had the bovine growth hormone injected into them in order to produce larger individuals?
a. All of the answer choices are correct. b. cows c. fish d. pigs e. sheep