Biology final questions part 2

Vestigial structures, such as hip bones in whales and appendixes in humans, are those that have little or no function for the organism. What is the most likely reason for this loss of function over time?

• A. The organism is undergoing speciation

• B. The organism is experiencing genetic drift

• C. The structure was over utilized by the organism

• D. The structure was not highly beneficial to the organism.

Students studying a moth population in the woods in Kentucky found the distribution of moth wing color shown in the graph below. The woods contained trees with bark that was mostly black. Two years later a fungus attacked nearly all of the trees in the woods and the tree bark changed from black to patches of gray and white. Which graph shows the probable distribution of moth wing color within the next few years?

• Graph F

• Graph G

• Graph H

A student was asked to identify the following organism based on the dichotomous key.

• Class Insecta

• Order Scorpiones

• Order Araneae

• Order Amblypygi

Which diagram accurately depicts the levels of organization in a human?

• Cells, Tissues, Organs, Organ systems

• Organ systems, Organs, Tissues, Cells

• Cells, Organs, Tissues, Organ systems

• Organ systems, Tissues, Organs, Cells

Which statement is best supported by the information in this dendrogram?

• Lesser pandas are more genetically similar to giant pandas than they are to raccoons.

• Brown bears are more genetically similar to giant pandas than they are to sun bears.

• Lesser pandas are more genetically similar to raccoons than they are to giant pandas.

• The bear species are all more genetically similar to dogs than they are to giant pandas.

The bullfrog, Rana catesbeiana, is most closely related to the:

• Spotted chorus frog, Pseudacris clarkii

• Asian flying frog, Polypedates leucomystax

• Northern leopard frog, Rana pipiens

• African bullfrog, Pyxicephalus adspersus

Purple flowered plants are dominant over white flowered plants. If a white flowered plant is crossed with a heterozygous plant, what is the expected outcome of offspring that will have purple flowers?

• Half white, half purple

• Mostly purple, some white

• All purple

• All white

A student has cystic fibrosis, a genetic condition caused by the presence of a homozygous recessive gene. What could be her parent's genotypes for the cystic fibrosis trait?

• Her father is homozygous dominant; her mother is homozygous recessive.

• Her father is homozygous dominant; her mother is homozygous dominant.

• Her father is heterozygous; her mother is homozygous dominant.

• Her father is heterozygous; her mother is homozygous recessive.

The opossum, which is native to North America, and the kangaroo, which is native to Australia, are marsupials. The fact that both these mammals incubate their immature offspring in a pouch provides evidence that they:

• belong to the same species

• must range great distances to eat

• have very similar skeletal structures

• are descended from a common ancestor

The limbs of several organisms are shown in the illustrations below. Scientists sometimes compare the limbs of these organisms to look for evidence of common ancestry. These limbs provide evidence of common ancestry because they __________.

• have the same basic structure

• perform the same function

• are the same size

• are parts of mammals