A salamander, raised away from water until long after its siblings, will swim every bit as well as them the very first time it is placed in the water. For salamanders, swimming is a(n)
Plants must use oxygen in the process of respiration. Based on this information, which of the following is a valid conclusion?
Plants are likely incapable of anaerobic respiration.
Plants only engage in anaerobic respiration.
Plants must use a synthetic respiration process.
Plants do not respire, only animals.
An animal cell is placed in a solution of distilled water. If left overnight, this cell will
shrivel and die.
swell and burst.
remain the same, since it has a cell wall to protect it.
The spines of a cactus are modified leaves. The thorn of a rose is a modified branch. What does this suggest about the evolution of these two families of plants?
The spine and the thorn are homologous structures and are proof of common ancestry.
The spine and the thorn are analogous structures and are not proof of common ancestry.
The spine and the thorn have separate functions, so they are not homologous and provide no evidence to support a common ancestor.
The spine and the thorn are vestigial structures that have not evolved.
Which of the following actions will have a positive effect on the natural environment?
overuse of garden fertilizers
placing grass clippings in plastic bags and sending them to a landfill
carpooling with three coworkers who live nearby
voting in favor of a local referendum to fill in marshland