Which of the following is described as the process of manipulating genes, that are usually outside the normal reproductive process?

Which of the following is the enzyme that is used to remove or knockout genes?

What is the role of Agrobacterium tumefaciens in the production of transgenic plants?

In gel electrophoresis of DNA, the different bands in the final gel form because the DNA molecules __________.

In order to insert a foreign gene into a plasmid, both must __________.

Which of the following is the most important discovery that led to the development of rDNA technology?

Which of the following statements about rDNA technology is TRUE?

i. rDNA technology is used to obtain large number of copies of specific DNA fragments.

ii. rDNA technology is used to obtain large quantities of proteins produced by the concerned gene.

iii. rDNA technology is used to integrate gene of interest into chromosomes where it expresses itself.

Which of the following represents the longest time period?

We cannot accurately measure time in years with stratigraphy for several reasons. Which of the following statements is FALSE?

An undeformed sedimentary layer is __________ than the layer above and __________ than the layer below.

How do gene mutations contribute to evolution?

If p equals the frequency of the dominant allele and q equals the frequency of the recessive allele, which of the following terms represents the frequency of the individuals who show the dominant phenotype?

A survey reveals that 25% of a population of 1 000 individuals have attached earlobes (are homozygous recessive for the trait). If the population fits the parameters of Hardy-Weinberg law, which of the following is the frequency of the recessive allele?

In certain Native American groups, albinism due to a homozygous recessive condition in the biochemical pathway for melanin is sometimes seen. If the frequency of the allele for this condition is 0.06, which of the following is closest to the frequency of the dominant allele in this population, assuming that the population is in Hardy-Weinberg equilibrium?

In the wild, two bird species are found living in the same tree and appear to be reproductively isolated. In captivity, it is found that the two species can breed and form viable, fertile offspring. Which one is most likely their natural reproductive barrier?

Which of the following is best explained by the principle of common descent?

Which of the following describes a postzygotic mechanism of reproductive isolation?

A group of scientists is studying Tetragnatha spiders on the island of Hawaii. A large lava flow has divided the spiders’ forest habitat into two parts. As a result, a population of Tetragnatha spiders has become isolated on either side of the hardened lava. Which of the following best predicts how the lava flow will affect the spider populations over time?

An athlete explains that his muscles have become well-developed through daily activities of weightlifting. He believes that his offspring will inherit his trait of well-developed muscles. This belief would be in most agreement with the theory set-forth by __________.

Which among the following is NOT included as part of our modern understanding of evolution?

Sexual reproduction is related to evolution because it __________.

A population of mosquitos is sprayed with a new insecticide. Most of the mosquitos are killed, but a few survive. In the next generation, the spraying continues, but still more mosquitos hatch that are immune to the insecticide. How could this result be explained according to the present concept of evolution?

Which of the following could be used as evidence to show that two different species most likely developed from a single, common ancestor?

The thorns on a cactus and quills on a porcupine would be an example of __________structures.

If organisms A, B, and C belong to the same class but to different orders and if organisms D, E, and F belong to the same order but to different families, which of the following pairs of organisms would be expected to show the greatest degree of structural homology?

What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdom?

Dozens of potato varieties exist, differing from each other in potato-tuber size, skin color, flesh color, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classification scheme is most likely to come from an adherent of the phylocode method of classification?

Some molecular data place the giant panda in the bear family (Ursidae) but place the lesser panda in the raccoon family (Procyonidae). Consequently, the morphological similarities of these two species are probably due to __________.

In angiosperm plants, flower morphology can be very intricate. If a tree, such as a New Mexico locust, has flowers that share many morphological intricacies with flowers of the sweet pea vine, then the most likely explanation for these floral similarities is the same general explanation for the similarities between the __________.

The four-chambered hearts of birds and the four-chambered hearts of mammals evolved independently of each other. If one were unaware of this independence, then one might logically conclude that __________.

At one time, scientists classified bacteria and protists together in one kingdom, but now they are in two separate domains. What evidence supported putting bacteria in a separate domain?

Fungi were once classified as plants. Now they are placed in their own kingdom. Why were fungi removed from the plant kingdom?

Generally, within a lineage, the largest number of shared derived characters should be found among two organisms that are members of the same __________.

The common housefly belongs to all of the following taxa. Knowing which of the following should provide you with the most specific information about the common housefly?

What is the primary purpose of a phylogenetic tree?

Referring to the figure below, the two extant species that are most closely related to each other are __________.

Referring to the figure below, which of the species are extinct?