Which of the following was likely MOST important for life to begin existing on Earth? A. sunlight B. DNA C. a source of oxygen D. a source of energy
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Which of the following was likely MOST important for life to begin existing on Earth?
-
A.
sunlight
-
B.
DNA
-
C.
a source of oxygen
-
D.
a source of energy
The correct answer is-
C. Sunlight
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- Which of the following is the last step in the Oparin-Haldane Model for the beginning of life? a. Membranes form around the first cells b. Simple molecules assembled into building blocks c. Polymers assembled from simple building blocks d. Asteroids and meteors provide building blocks for life on earthThe first forms of life on Earth were a. plants b. microorganisms c. birds d. dinosaursOrganisms require_____ and_____ to maintain themselves, grow, and reproduce. a. DNA; energy c. nutrients; energy b. food; sunlight d. DNA; cell
- what simple organic molecules were likely the precursors of life? a. water and proteins b. amino acids and nucleotides c. oxygen and carbon d. prokaryotes and eukaryotesThe first forms of life on Earth were thought to be_________. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursScientists think that terrestrial life probably originated in Earth's oceans becauseChoose one: A. energy was available there. B. all of the chemical pieces were there. C. All of the possible answers are correct. D. the earliest evidence for life on Earth comes in ocean-dwelling forms.
- Choose the answer from the given concept below. A. Extraterrestial Origin B. Divine Creation C. Spontaneous Origin D. Big bang theory 1. this is the oldest among life's origin theories and the most accepted among others. It may vary vary on the practice of a religion, but it's commonality is that a Divine God created life. It is called the 2.Meteorite contains amino acids, nucleotide bases and sugar. Hundreds of thousands of meteorites and comets are known to have fallen into the early Earth, suggesting that it may contain some organic material. It is referred as the 3. Greek philosopher Aristotle proposed a theory eith the idea that living matter may arise from non-living matter. These are based on early observations such as the appearance of maggots in rotting meat, mice on corn and fish from mud of previously dry lakeswhere on the earth did life mostly likely first emerge, where all the ingredients and conditions for life existed? a. volcanic islands b. deep oceanic vents c. tidal pools d. tropical rainforestIn what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2) appearance of photosynthetic organisms, (3) appearance and increase of O2 in the atmosphere, (4) self-replicating RNA developsa. 4, 2, 3, 1b. 2, 3, 1, 4c. 3, 1, 4, 2d. 1, 2, 4, 3
- Life first appeared on Earth ___________ of years ago.Choose one: A. billions B. hundreds of thousands C. thousands D. millionsWhile how the first cells formed is still unknown, scientists suspect that the first active biological macromolecule wasa. protein.b. DNA.c. RNA.d. carbohydrates.What types of organisms can produce their own food required to survive? A. Organisms that can do cellular respiration B. Organisms that have free-floating DNA C. Organisms that can do photosynthesis D. Organisms with a special enzyme