The images show two different types of galapagos tortoises that scientists believe descended from the same species. the first type (left) are found on islands that have vegetation and few grasses. the second type (right) are found on an island that has large amounts of grasses and low lying scrubs. what explains the type of turtle found on the islands with high vegetation?
a)the environment triggered a gene mutation in neck length in order to the turtle survive,
b)mutations are random, so it is by chance that turtles with longer necks live on these islands,
c)turtles with genes for long necks had a better chance of surviving go reach reproductive age,
d)turtles with shot necks completely lacked adaptations for finding food, so they died off.

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

The ph is the a.independent variable b.the dependent variable c.control group

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c.what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?