Proposed that species change through time?
a. Charles Lyell, Jean Baptiste de Lamarck, and Alfred Russel Wallace
b. James Hutton, Charles Darwin, and Alfred Russel Wallace
c. Aristotle, Charles Darwin, and Jean Baptiste de Lamarck
d. Charles Darwin, Jean
Ans: d. Charles Darwin, Jean
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Choose the direction in which phloem can transport materials
A. sink to source B. source to sink C. sink to sink D. source to source
What is one characteristic of sensory receptors?
a. Sensory receptors consist of the endings of efferent neurons. b. Sensory receptors detect changes in the external or internal environment. c. Several sensory organs make up a sensory receptor. d. Sensory receptors produce small amounts of energy on a continual basis. e. Sensory receptors detect changes in the external but not the internal environment
Assume you were studying two characteristics of peas, and when you crossed heterozygous F1 individuals you did not see the 9:3:3:1 ratio predicted for a dihybrid cross. You later found that these two characteristics were on the same chromosome. With this information, how would you explain the results?
A. The results can be explained as polygenic inheritance. B. The pea plants must have acquired a new chromosome. C. The genes are linked and are inherited together. D. The genes must be on the sex chromosomes. E. There must have been a mutation.
The dinosaurs (other than birds) went extinct during the asteroid impact at the K-P boundary because they were poorly adapted to their ecological niches.
a. true b. false