WorksheetsQ2_1-Evolving Concept of Life Based on Emerging Piece
Total questions: 15
Worksheet time: 15mins
Dinosaurs are reptiles that existed for a very long time. Which era did these organisms evolve?
Cenozoic Era
Mesozoic Era
Paleozoic Era
Proterozoic Era
What are the first photosynthetic organisms that grew well on earth?
bryophyllum
cyanobacteria
stromatolites
zircon crystal
The oxygen revolution changed Earth’s environment dramatically. Which of the following adaptations took advantage of the presence of free oxygen in the oceans and atmosphere?
The evolution of cellular respiration, which used oxygen to help harvest energy from organic molecules.
The evolution of chloroplasts after early protists incorporated photosynthetic cyanobacteria.
The evolution of multicellular eukaryotic colonies from communities of prokaryotes.
The evolution of photosynthetic pigments that protected early algae from the corrosive effects of oxygen.
Why did it take millions of years for life to appear on Earth after the planet had formed?
It took millions of years for RNA to replace DNA.
The planet had warmed up enough to sustain life.
The planet had cooled down enough to sustain life.
Life on Earth could begin only when seedlings arrived on our planet from other worlds.
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 are called the remains of living organism used in understanding the history of life on earth?
bone
fossils
seeds
shells
Which statement is NOT true of fossils?
Plants can form fossils.
Some bacteria can form fossils.
Most extinct organisms have been preserved.
A small percent of extinct organisms is preserved.
Which of the following can be considered as a fossil?
a billion-year old rock
a billion-year old piece of amber
a billion-year old amber with a primitive insect inside
the choices are all correct
What unique substance do researchers look after in their study of eukaryotes?
biomarkers
fossils
mitochondria
stromatolites
What is the evidence for a last universal common ancestor among life on earth?
They are all aerobic.
They all look the same.
They all have the same synthesis pattern.
They share the same underlying molecular biology.
Which statement best shows the main significance of studying the past?
The past is attractive to look back.
It will give jobs for many scientists and paleontologists.
It will allow them to think what they need to study.
Understanding the past allows us to predict the future and help in creating it.
One significance of knowing the history of life is to determine the origin of one living organism. According to researchers, which of the following are the only surviving species of the genus Homo and one of the living evidences that life has existed on Earth?
birds
dinosaurs
human beings
sponges
Over the past decades, there are challenges that the environment has faced. Pandemics affected the lives of various living organisms. What is the significance of knowing this history?
It will give them an income.
They will just be informed about it.
It will lead them to know the history of life.
It will give an idea on how medical world will seek for the treatment.
The following statements are challenges for the researchers in finding and identifying signs of early cells. Which is not part of the group?
Materials and testing laboratories are not available.
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.
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 found in animals.
It is produced by endosymbiosis.
It formed during volcanic eruptions.
It consists of layered bacteria and sediment.
