SUMMATIVE EXAM IN GENBIO2 - QUARTER 1

The process of changing or altering the genes may be summarized in four basic steps, which among the following steps come first?

• a. Isolate the DNA from the cell and identify the target part of the DNA

• b. Cut the specific part of the DNA through a special enzyme

• c. Combine the DNA from two different sources

• d. Introduce the new formed DNA to the host cell

In the field of medical advancement, one of the earliest developments in the field recombinant DNA technology is the production of _______, which is mainly used in the treatment of diabetes.

• a. BTCorn

• b. Flvr-Svr Tomato

• c. Insulin

• d. Glucose

How will you describe the Geologic Time Scale?

• a. It divides up the history of the earth based on life-forms that have existed during specific times since the creation of the planet.

• b. It sums up the history of the earth based on life-forms that have existed during specific times since the creation of the solar system.

• c. It sectioned the history of the earth based on non-living things that have existed during specific times since the creation of the planet.

• d. It divides up the history of the earth based on spheres of the Earth where life-forms have existed during specific times since the creation of the planet

How will you differentiate artificial selection from natural selection?

• a. Artificial selection happens when nature dictates the fittest organisms to survive and continue their generation, while natural selection is a laboratory type of selectively choosing the best DNA copy from cells.

• b. Artificial selection happens in laboratories while natural selection happens in nature.

• c. Artificial selection is manipulated by humans and natural selection is dictated by the environment of the organisms.

• d. B and C

Explain how patterns of descent with modification from common ancestors produce the organismal diversity of the present.

• a. Old organisms habitually use their organs and traits until it became dominant to suit their needs.

• b. Old species with favorable traits suited in their environment will pass on the said trait to their offspring, this process will continue until such time that an organism with specialized trait arrived, giving way to a new different species.

• c. Disuse of some part of the genes of an organism lead to mutation which in turn will be passed on to its offspring

• d. All of the above

His work prompt Darwin to also publish and communicate Darwin’s theory on the speciation of organisms on Earth.

• a. Charles Darwin

• b. Alfred Russel Wallace

• c. Jean Baptiste Lamarck

• d. Charles Dassel

Which among the following best explain the fossil records as an evidence of evolution?

• a. Recorded events from the past indicates that the Earth was once filled with water.

• b. Fossils suggest that the Earth is not the same as it is today, for instance there were once a huge massive interconnected land termed as Pangaea.

• c. Fossils recorded the history of life on Earth and indicates that ancient life forms were different from modern day species.

• d. Recorded activities of animals from prehistoric times suggest that people came from monkeys.

How will you use biogeography as an evidence to infer evolutionary relationship?

• a. Organisms living closer at each other and sharing the same niche are also closely related to each other.

• b. The unique characteristics of the organisms living on a secluded area is indicative of their ancestry and speciation.

• c. Biogeography revealed that organisms with similar developmental pattern even if found at different places might once live together before they were separated due to natural events or forces.

• d. All of the above

Explain how the structural and developmental structures of organisms may be used to determine the evolutionary relationship between organisms?

• a. Body structures often reflect same descent if scrutinized and made sure that homology is present.

• b. Body structures always represent relativeness of organisms which show how they came from a common ancestor with same structures.

• c. Developmental structures of organisms showed how organisms evolve and adapt with their environment and biogeographical profile.

• d. Vestigial structures of organisms indicate that organisms don’t change in time.

In a cladogram, how will you deduce DNA sequence relations between organisms?

• a. Organism which are closer to roots contain multiple mutated genes as an evidence of changes through time.

• b. Organisms near the nodes of a cladogram will be daughter taxa that have completely different DNA sequences from each other.

• c. Organisms found closer to each other will have more similar DNA sequences and were considered more closely related to each other.

• d. Cladograms cannot be used to determine DNA structures of organisms.