You set your time machine for 3 billion years ago and push the start button. When the dust clears, you look out the window. Which of the following describes what you would probably see?a. a cloud of gas and dust in spaceb. green scum in the waterc. land and water sterile and devoid of lifed. an endless expanse of red-hot molten rock

Fill in the blanks in the following graph, which illustrates the decay curve of a radioactive element used to date fossil structures.

If a solution surrounding a cell is hypertonic relative to the inside of the cell, how will water move?a. It will move into the cell via osmosis.b. It will move out of the cell via osmosis.c. It will not move, because equilibrium exists.d. It will evaporate from the cell surface more rapidly.

The process of biological evolution .a. is not supported by scientific evidence;b. results in a change in the features of individuals in a population;c. takes place over the course of generations;d. B and C are correct;e. A, B, and C are correct

Which factor most likely caused animals and plants in India to differ greatly from species in nearby southeast Asia?a. The species became separated by convergent evolution.b. The climates of the two regions are similar.c. India is in the process of separating from the rest of Asia.d. India was a separate continent until 45 million years ago.

Which of the following best characterizes an adaptive radiation?a. Descendant species occupy a large geographic area.b. A single lineage diversifies rapidly, and descendant species occupy many habitats and ecological roles.c. Natural selection is particularly intense, because disruptive selection occurs.d. Species recover after a mass extinction.

What two conditions must be present for osmosis to occur?Integral membrane proteins are anchored in lipid bilayers.

How does the hydrolysis of ATP result in the movement of a motor protein along a cytoskeletal filament?

Large-scale, worldwide adaptive radiations have occurred in which of the following situations?(A)when there are no available ecological niches(B)after each of the big five mass extinctions(C)after colonization of an isolated island that contains suit-able habitat and few competitor species(D)whenever an evolutionary innovation was needed for or-ganisms to thrive