Evolving Concepts of Life : Emerging Pieces of Evidence

Which of the following can be considered as a fossil ?

• a billion-year old pieces of amber

• a billion-year old amber with primitive insect inside

• a billion-year old rock

• the choices are all correct

Mainly the fossils are found on sedimentary rocks. What type of rocks are stromatolites?

• Igneous

• Sedimentary

• Metamorphic

• Trilobites

Which of the following is NOT TRUE about the evidence that fossils provide?

• All fossils gathered contain intact DNA that can be sequenced.

• Fossil ages can often determined by testing nearby rocks.

• Fossilized organisms often share physical similarities with living organisms.

• Some fossilized organisms are transitional forms between groups of organisms.

Oxygen was scarce during the early development of Earth. By this situation , what kind of organisms first existed?

• Aerobic organisms

• Anaerobic Organisms

• Mammal

• Protist

Why do you think the emergence of plants & animals came later than simple living organisms?

• The cell structure of these multicellular organisms are more complex.

• Their existence is not that important on Earth.

• Their size is too big it takes longer time for development.

• These organisms composed of many nucleus compared to unicellular.

Arrange the following, from the first to the last that existed or evolved :

Eukaryotic cell , Prokaryotic cell , Organic molecules , photosynthesis

What unique substance do researchers look after in their study of eukaryotes?

• Biomarkers

• Fossils

• Mitochondria

• Stromatolites

What is the significance of studying the molecular evidence present among living organisms?

• It will allow the classification of living organisms.

• It will benefit the economy of the world

• It will give Ideas to scientist to clone.

• It will then serve the basis of what to study.

The study of the history of life is indeed significant. As part of searching for the fossils of the previous organisms, stromatolite played a significant role. What is true about stromatolite?

• It is found on eukaryotes.

• It is produced by endosymbiosis.

• It is consist of layered bacteria & sediments.

• It is formed during volcanic eruption.

The following statements are challenges for the researchers in finding & identifying signs of early cells. Which among the choices should NOT be included?

• Cells are microscopic and most have no parts to fossilize.

• Materials & testing laboratories are not available.

• Slightly younger rocks had been heated up & undergone other processes.

• Tectonic plate movements have destroyed nearly all rocks older than about 4 billion years.