Concept explainers
In one of the most spectacular archaeological finds in cen-
turies, skeleton of tiny human relative were discovered on
a remote Indonesian island in 2004. Nicknamed “Hobbits,”
Homo floriesiens adults had a skulls the size of grapefruits
And were no bigger than the 3 year old modern children. Homo
floriesiens lived alongside pygmy elephants, giant rodents and
komodo dragons. Why might Homo floriesiens have
evolved to have very small size in its environment?
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
Conceptual Integrated Science
Additional Science Textbook Solutions
Applications and Investigations in Earth Science (9th Edition)
Anatomy & Physiology (6th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Chemistry: Structure and Properties (2nd Edition)
Microbiology: An Introduction
- Suppose a human generation is defined as the average time from birth to childbearing, which is about 20 years long. How many generations have passed in the 200,000 years during which anatomically modern humans have existed?arrow_forwardIf life is based on information, what is that information?arrow_forwardWhy is liquid water generally considered necessary for the origin of life?arrow_forward
- Why is life unlikely to be found on the surface of Mars today?arrow_forwardDescribe one hypothesis for how cells first developed.arrow_forwardIf we do find life on Mars, what might be some ways to check whether it formed separately from Earth life, or whether exchanges of material between the two planets meant that the two forms of life have a common origin?arrow_forward
- A radio broadcast left Earth in 1911. How far in light years has it traveled? If there is, on average, 1 star system per 400 cubic light years, how many star systems has this broadcast reached? Assume that the fraction of these star systems that have planets is 0.50 and that, in a given planetary system, the average number of planets that have orbited in the habitable zone for 4 billion years is 0.20. How many possible planets with life could have heard this signal?arrow_forwardWhich statements best describe natural selection?arrow_forwardNeed help on this biology homework question.arrow_forward
- Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningStars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage Learning
- AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStaxStars and GalaxiesPhysicsISBN:9781305120785Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning