- During diffusion, do molecules move from a higher to a lower concentrationor from a lower to higher concentration?
- does a loud sound have a high AMPLITUDE or high FREQUENCY
- what is the relative motion of 2 objects moving in the same direction
- what do we hear when air particles move back and forth a lot
- what part of the ear vibrates when sound waves reach it
- what do we hear when particles vibrate more gently/less
- Eukaryotic cells are more _______ and ______ than prokaryotic cells
- A researcher determines a cell has a flexible cell wall composed of peptidoglycan. This observation narrows possible classifications of the cell to which taxonomic group
- A mew organism is discovered. It is multicellular, autotrophic, and does not move on its own. In which kingdoms could the organism belong
- A cow and a frog have similar bone structures in their forelimbs. Both have phalanges, radius, ulna, and humerus bones. However, the cow and frog are animals with very different life cycles from each other. Which most likely describes why the body structures of these animals are so similar?
- Scientists are able to correlate time and the amount of difference between homologous genes whenstudying the divergence of two species because scientists have reliable estimates for which value?
- does a high pitched sound have a high FREQUENCY or high AMPLITUDE
- to determine how closely related organisms are, scientists consider all of the following exept
- The half-life of a radioactive isotope is 2,000 years. How much of the radioactive isotopespecimen will remain after 4,000 years?
- What kind of structures is the pelvis and femur in a whale or shark
- The illustration below represents a rapid change that occurred in a type of shelled protist calledforaminiferans. Which statement best characterizes the period approximately 5.5 million years ago?
- The Tiktaalik roseae fossil was recently discovered. This fossil is of a fish that lived approximately 370 million years ago. It had scales like fish. Unlike other fish fossils, this fossil has fins with jointed wrists similar to the wrist of a crocodile. Which reason is the most likely for the natural selection of this type of jointed wrist?
- In Africa there are two species of elephants. One species lives in the forest of central Africa and another species lives in the savanna of Africa. It was recently hypothesized that an isolated group of elephants living in western Africa may be a different species from the other two groups. Which development in technology would best be used to determine if the elephants are the same species?
- Scientists observed that the shells of some marine bivalves are more vulnerable to chemical and physical damage than others. How could these differences affecct the accuracy of the fossil record
- The discovery of a fossilized animal with teeth, a long bony tail, and feathered wings helped to establish which evolutionary sequence?