Recently, the bones (not fossils) of a possible new species of humans (in the genus Homo) have been found on an island in Indonesia (an island nation southeast of Asia). Using radiometric dating, scientists can show that these people were alive as
recently as 17,000 years ago. According to the information in this chapter, why do you think they probably used tools?
What will be an ideal response?
Stone tool use started as early as 2.5 million years ago within the genus Homo.
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Human height is a trait affected by both genes and the environment. How is this so?
What will be an ideal response?
An insertion sequence is distinguishable from other mobile genetic elements because ________.
A. it encodes a transposase B. it is composed of DNA C. it is highly complex D. it is smallest
A scientist is investigating a hormone response in rose bush stems by removing the apical meristems of the main stems. What is the most likely result of this experiment and what hormone is responsible?
A. Flowers will turn yellow and fall off under the influence of auxin. B. Lateral buds will develop under the influence of cytokinin. C. New apical buds will develop under the influence of auxin. D. More leaf buds will appear along the main stems under the influence of auxin. E. Larger, deeper roots will form under the influence of cytokinin.
_______________ roots from an existing root originate with pericycle cells in the root's vascular cylinder.
A. Adventitious B. Propagative C. Surface D. Lateral E. Tuberous