5. A(An)
is a well-tested explanation that unifies a broad range
of observations.
6. In
reproduction, the new organism has a single parent.
7. A(An)
is a signal to which an organism responds.
8. The
system is a decimal system of measurement whose units
are based on certain physical standards and are scaled on multiples of 10.
Matching in the space provided, write the letter of the definition that best matches each term.
9. biology
a. a collection of living matter enclosed by a barrier that
10. microscope
separates it from its environment
b. combination of chemical reactions through which an
11. cell
organism builds up or breaks down materials
12. cell fractionation c. a laboratory technique in which a group of cells develops
13. homeostasis
from a single cell
14. metabolism
d. process of keeping an organism's internal conditions
constant
15. cell culture
e. a device that produces magnified images of structures
that are too small to see with the unaided eye
f. a laboratory technique in which cells are separated into
cell parts
g. the science that seeks to understand the living world
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The collared lizard is a species found in the desert southwest. male collared lizards show considerable color variation, ranging from brightly colored to a very dull pattern. your goal is to determine the function, if any, of male color patterns in collared lizards, using the scientific method. your tentative explanation is that male color plays a role in attracting females for mating purposes. you predict that females will preferentially choose brightly colored males over dull-colored ones. to test this prediction, you observed the interactions of female collared lizards with their male counterparts. you selected males that were the same age and size, and that differed only in their coloration pattern. you placed equal numbers of the two types of male lizards, bright and dull, in aquariums, along with one female lizard per aquarium. out of 350 aquariums observed, the female chose to mate with the brightly colored male 277 times, and the dull-colored male 70 times. in 3 instances, the females did not mate with either type. create a bar graph of your data, plotting the type of male (dull or brightly colored) on the x-axis. on the y-axis, plot the frequency with which each type of male was chosen by females. using this graph, answer the following question(s). is it reasonable to conclude (i.e., is it supported by the data) that female collared lizards prefer more brightly colored male lizards over dull-colored males?

Determine if the following statement is true or false. if true, choose true. if false, choose the rewording that is true. according to the law of independent assortment, alleles for each gene are inherited together so that they always stay together. according to the law of independent assortment, offspring express a combination of their parents' traits. according to the law of independent assortment, alleles for a characteristic split during meiosis and combine during fertilization. true according to the law of independent assortment, alleles for each gene are inherited independently so that no two alleles stay together.

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing