Exam 1: Biology

unequal sharing of electrons.

A water molecule, as shown here, is polar because of

They all produce H+ ions in solution, making them acids.

What do lemons, tomatoes, and coffee all have in common chemically?

observation, hypothesis, experiment, conclusion, scientific theory

Which answer choice lists the steps of the scientific method in the correct order?

release hydrogen ions when dissolved in a liquid

Which of the following is a property of acids?

It is denser when frozen than when liquid.

Which of the following is not a property of water?

iron

Which of the following is not one of the most common elements in living things?

Living organisms are able to maintain their internal body temperatures because the water in their cells resists changes in temperature.

Which of the following would be an example of the value of water's heat capacity?

Original hypotheses are formed after an experiment.

Which statement regarding the scientific method is false?

Response to the environment

As fall approaches, white-tailed deer begin to accumulate a layer of body fat. This is an example of which characteristic of life?

Adaptation

Many insects do not see into the red color range, and as a result, many insect-pollinated flowers are colors other than red (e.g., purple and yellow). This flower coloration would be considered a(n)

Agricultural chemicals can cause deformities and feminization amongst cane toads.

Populations of amphibians, including frogs and toads, have been plagued by disease and high rates of deformity. A recent study investigated whether problems among the populations have arisen due to poisons from chemicals associated with agriculture. Biologists from the University of Florida collected local adult cane toads (Bufo marinus) from more than 20 different locations. Toads were collected from areas close to agriculture—both large-scale and small-scale farms as well as from suburbs. At collection sites where 50-97% of the adjacent land was farmed, males showed high levels of feminization. Feminized male toads were similar in color to females and had lower levels of testosterone and often had deformed gonads. These changes can lead to sterile males or changes in behavior that prevent mating from occurring. Which of the following statements would be considered a hypothesis for this study?

oxygen share electrons with two hydrogen atoms.

The atomic structure of water satisfies the octet rule by having

Organs

The circulatory system of a whale is considered an organ system because it is composed of different

natural selection; adapted to

The process of ________ leads to organisms that are ________ that environment.

descent with modification

The various species of honeycreepers have an assortment of different bills, but all honeycreeper species have a similar size and body shape. This is an example of

neutron number.

isotopes of an element differ in their