Earth and Life (QUARTER 2-WEEK 1)

"Endosymbiosis" means...

• Living together

• Living inside

• Entering together

• Joining together

The Miller-Urey experiment of 1953 was designed to test the hypothesis that lightning supplied the energy needed to turn atmospheric gases into organic molecules such as amino acids. Which of the following describes why the Miller-Urey theory is widely accepted today?

• Amino acids spontaneously form from molecules in the atmosphere today.

• Organic molecules are present today in extremely high concentrations.

• No other alternative hypotheses have been introduced.

• The process of synthesizing organic molecules from a mixture of gases has been successfully modeled in the laboratory.

What gas was necessary for complex (eukaryotic) life to evolve?

• Carbon dioxide

• Dihydrogen monoxide

• Oxygen

• Methane

What was formed in the Miller-Urey experiments?

• amino acids

• proteins

• living cells

• DNA

Which of the following supports the hypothesis of an “RNA world” on early Earth?

• The oldest known fossils contain trace amounts of RNA.

• Single-stranded RNA molecules are linear and do not form three-dimensional shapes.

• RNA is the primary genetic material of many viruses.

• Some RNA molecules are important catalysts in modern cells

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

• They contain more nucleus compared to lower forms of organisms

• Their cell structures are more complex.

• They are the least important factor in the environment.

• They are too big and take time to form.

Which of the following statements is not correct?

• The earliest form of life were the prokaryotes

• Organisms change over time as a result of adaptation for survival.

• Photosynthetic organisms decreased the amount of oxygen in the atmosphere.

• Multicellular organisms evolved from unicellular eukaryotes.

Where is the first form of life seen?

• layers of rocks

• sediments

• oceanic crust

• microfossils

Which of the following is the first photosynthetic organism to form?

• cyanobacteria

• fungi

• gymnosperm

• algae

What is the idea that Earth's early oceans had organic molecules that became the first life?

• Primordial soup hypothesis

• Miller-Urey Experiment

• Bubble hypothesis

• . Radioactive dating theory