WorksheetsModule 21 - Evolving Concept of Life
Total questions: 15
Worksheet time: 8mins
During which era did dinosaurs evolve?
Cenozoic Era
Mesozoic Era
Paleozoic Era
Proterozoic Era
What are the first photosynthetic organisms that grow well on earth?
Bryophyllum
cyanobacteria
stromatolites
zircon crystal
Which types of organisms developed first due to the early environmental conditions on Earth?
eukaryotic and aerobic
eukaryotic and anaerobic
prokaryotic and aerobic
prokaryotic and anaerobic
What unique substance do researchers look after in their study of eukaryotes?
stromatolites
biomarkers
fossils
mitochondria
The study of history of life is significant in many aspects. The stromatolites played a significant role as a source of evidence. What is stromatolite?
It is formed during volcanic eruptions.
It consists of layered bacteria and sediment.
It is produced through endosymbiosis.
It is found in animals.
What kind of organism first existed during the early development of Earth when oxygen was scarce?
Aerobic organism
Protist
Anaerobic organism
Mammal
Which of the following statements is NOT true on the evolution of multicellular organisms?
They are formed from other multicellular colonial aggregates through cells specialization.
They are believed to have evolved from single-celled prokaryotic organisms.
The prokaryotic organisms that formed multicellular aggregates were like the cells of Cyanobacteria.
The process of continuous specialization brought more complex organisms.
Why do you think the emergence of plants and animals came later than simple living organisms?
These organisms composed of many nucleus compared to unicellular.
Their size is too big that it takes longer time for development.
Their existence is not that important on Earth
The cell structures of these multicellular organisms are more complex.
Which statement is incorrect about living organisms?
Evolution of oxygen-producing organisms allow the increase in the atmospheric oxygen.
The earliest forms of life existed were the prokaryotes.
The eukaryotic organisms evolved from the unicellular prokaryotic.
Organisms did not change despite of the changes in the environment.
Place the following in the order of their appearance: 1. Oxygen-producing organisms, 2. Unicellular prokaryotic organisms, 3. Multicellular organisms, 4. Eukaryotic organisms
2, 1, 3, 4
1, 2, 4, 3
1, 2, 3, 4
2, 1, 4, 3
Which statement best shows the main significance of studying the past?
It will allow researchers to think what they need to study
It will give job for many scientists and paleontologists.
The past is attractive to look back.
Understanding the past allows to predict the future and help in creating it.
One of the significance of knowing the history of life is to determine the origin of one living organism. According to researches, the ___are the only surviving species and one of the living evidences that life have existed on Earth and evolved from Homo erectus.
birds
dinosaurs
human beings
sponges
Over the past decades, there are challenges that environment has been facing. Pandemics affected the lives of various living organisms. What is the significance of knowing this history?
It will give an idea on how medical world will seek for the treatment.
It will give medical practitioners an income.
It will lead scientists to know the history of life.
It will lead scientists to know the history of life.
The following statements are challenges for the researchers in finding and identifying signs of early cells. Which is not part of the group?
Cells are microscopic and most have no parts to fossilize
Slightly younger rocks have been heated up and undergone other processes
Tectonic plate movements have destroyed nearly all rocks older than about 4 billion years.
Materials and testing laboratories are not available.
The study of history of life is significant in many aspects. The stromatolites played a significant role as a source of evidence. What is stromatolite?
It consists of layered bacteria and sediment.
It is formed during volcanic eruptions.
It is found in animals.
It is produced through endosymbiosis.
