The History Of Life On Earth Part 1 Of 2: Question Preview (ID: 29911)


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What event likely led to the extinction of non-avian dinosaurs?
a) A disease occurred that affected only dinosaurs. b) A massive asteroid struck Earth. c) A large ocean wave swept over most of the continents. d) Mammals were predators of the species.
When did non-avian dinosaurs become extinct?
a) 25 million years ago b) 65 million years ago c) 110 million years ago d) 460 million years ago
Why might it be more difficult to find fossilized remains of simple animals?
a) Simple animals are too small to see. b) Simple animals lack bones. c) both A and B d) neither A or B
Why is sexual reproduction critical to the process of evolution?
a) Sexual reproduction results in offspring with more genetic variety than asexual reproduction. b) Sexual reproduction results in organisms that are genetically identical to their parents. c) Sexual reproduction can produce more offspring than asexual reproduction. d) Sexual reproduction produces stronger organisms than asexual reproduction.
Which of the following is evidence for the common origin of all life on Earth?
a) All life needs oxygen to survive. b) All life is eukaryotic. c) All life has DNA as hereditary material. d) All life has cell walls.
Eukaryote life began ___________ prokaryote life.
a) before b) at the same time as c) after d) as a result of the extinction of
Prokaryotes are unicellular organisms that do not contain
a) ribosomes b) a cell membrane c) a cell wall d) a nucleus
About how many years ago did Earth form?
a) 4.55 million b) 455 million c) 4.55 billion d) 45.5 billion
How was Earth's atmosphere likely affected by the development of photosynthesis?
a) levels of oxygen increased b) levels of poisonous gases increased c) the atmosphere became more cloudy d) the atmosphere became cooler
The die-off of non-avian dinosaurs 65 million years ago is an example of a
a) population explosion b) episodic speciation c) mass extinction d) gradual extinction
Rats and opossums are modern examples of __________, which first appeared 200 million years ago.
a) mammals b) amphibians c) birds d) insects
What is an evolutionary tree diagram?
a) a diagram that lists the time period in which a group of organisms evolved b) a diagram that groups organisms based on what they eat c) a diagram that shows evolutionary relationships between organisms d) a diagram composed of only one species of organisms
In an evolutionary tree diagram, which two organisms are least closely related?
a) the two organisms that are farthest apart b) organisms that are separated by at least one other organism c) the two organisms closest to each other d) none of these
Two organisms branch from the same point on an evolutionary tree diagram. The point that they branch from represents a(n)
a) unrelated organism b) future species c) direct descendant d) common ancestor
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