Exam (elaborations)
BIOBEYOND UNIT 4- FIRST SIGNATURES OF LIFE
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BIOBEYOND UNIT 4- FIRST SIGNATURES OF LIFE
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BIOBEYOND UNIT 4- FIRST SIGNATURES OF LIFEFrom the video, what do scientists use to determine the age of these rock layers
exposed in the Australian desert? - Answers-Tiny mineral grains in the rock
Let's take a moment to review what you observed at Nilpena. The organisms you
observed represented: - Answers-The rise of the oldest complex organisms
If life was microscopic, what kind of evidence would be the easiest to look for while
observing the rock to indicate something once lived here? - Answers-Indirect
- Answers-click on image 2 or 3
Some of these images are clear examples. At least one is a less clear example and
may have surprised you. - Answers-image one
Which of these organisms most closely resembles the structures observed here in the
North Pole Dome? - Answers-second (?) one with gray/green tint ovr it
Which of the following is correct regarding stromatolites? - Answers-They are fossils of
where the organisms once lived
Which of the following images most closely represents the type of environment? -
Answers-image 1
Shown at right is a very special target, one you saw in Written in Stone. Let's see if you
remember why it's special - what does the area on the target represent? - Answers-
Time in Earth's history
Imagine the diagram at right is a dartboard and you, blindfolded, throw a dart at it.
Assuming you hit the dartboard, what type of life are you most likely to find with your
attempt? - Answers-Microbial
What does this mean for your search for life in the universe? What type of life is the
most appropriate type to look for, if it's out there? - Answers-Microbial
What characteristics could you use to identify more of these structures? The structure
has been outlined for you and you can get a closer look in the gigapan image
(magnifying glass icon) if necessary. - Answers-- Tiny laminations in the layers
- A foamy texture within the rock
- Appears eroded or a deeper cut in the rock
Here you see all of the observations that have been collected from this field site. Using
your new skills to identify possible signs of life, identify the images that could possibly
contain these signs of life based on visual observations. Click "Next" once you've made
your selections. - Answers-choose all 6
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