Exam 1: A View of Life

Studying a brick does not predict the design of a skyscraper.Intense examination of muscle tissues does not allow you to predict the design of a kangaroo or clam.The structure of chlorophyll does not dictate the unique structure of a tree.These cases demonstrate:

Humans have an exaggerated impact on the ecosystem through their use of extra sources of energy and raw materials,and the production of extra wastes that must be handled.

Tropical rainforests have many species that are found in great abundance.A study in the Brazilian rainforest found 487 tree species growing on a single hectare (2.5 acres).In the US and Canada together,there are only 700 species of trees on millions of acres.In one park in a Peruvian rainforest,scientists have identified over 1300 species of butterflies,while in all of Europe there are approximately 320 butterfly species.These findings suggest that:

Organisms belonging to the same _____ would be the most closely related.

Some members of Daphnia,a water flea,have a genetic mutation that causes them to prefer warmer environments.These members reproduce and pass these genetic changes to their offspring.The next generation will occupy warmer environments not previously occupied by this species.This is an example of:

An environmental biologist was studying the biodiversity of a wildlife refuge.In the area,he found pine trees scattered among a variety of mixed hardwood trees.In order to identify the pine trees,he counted the number of needles per bundle and measured the average length of the needles.This is a ___________ study.

To ensure a controlled experiment all of the following conditions (variables)should be identical in Group 1 and Group 2:

Which listing correctly indicates a sequence of increasing biological organization?

An elementary student decides to conduct an experiment comparing the effectiveness of two commercial soaps as cleaning agents,using each in paired tests of different types of stains and colors of cloth,where the only variable was the soap used.The student will use the judgment of classmates to decide if the stains remain equal or if soap one cleans better than the other in each test run.However,the student makes no prediction of which soap is expected to perform best.

Both living and nonliving entities adapt to the environment

Which of the following features are present at the ecosystem level?

Extinction can occur if a species is unable to adapt to a changing environment.

A researcher reports he has conducted many experiments where a galvanometer (lie detector)was hooked up to detect a plant's responses.He reports that when a spider was released near the plant,the spider's decision to escape was picked up by the plant,"causing a reaction in the leaf." When other researchers repeated the experiment,they could not get any galvanometer responses.The researcher then concluded that plants could be put into a faint by humans.

A university biology department wishes to hire a scientist to work on the relationships among the wolves,moose,trees and physical features on an island.If you were charged with writing the job description,you should title the position

One classic definition of life is "a self-replicating molecular assemblage." However,clay particles (in clay soil)contain layered aluminum and iron compounds that determine the pattern of the adjacent layers of sediment.This is technically a self-replicating molecular assemblage.

The control group in an experiment receives all the same treatments as the experimental group(s),except for the one variable being tested.

Both living and nonliving entities are organized at the cellular level

Which of the following terms best describes the collection of scientific data through observation in the field,such as observing the behavior of birds?

Living organisms are characterized by:

Which of the following domains contains the most primitive prokaryotes that live in extreme environments?