PBS Evolution: Great Transformations 1. If the world’s history were compressed into one hour, how long have humans been here?
Microbes. single-celled organisms

2. How long ago did mammals first appear on earth?
Mammals first appeared about 200 million years ago
3. What type of animal did the skull that Dr. Gingrich discovered resemble?
Dr. Gingrich discovered resembled a whale
4. What did “Whale Valley” used to be?
Whale valley used to be a sea

5. What unusual feature did they find at the end of the early tetrapods’ limbs?

6. How long ago did animals first appear on Earth?

7. When the mouse “eyeless” gene was implanted into the fruit flies, what happened?

8. How would walking on two legs be an advantage?

9. What modifications does the human skeleton have?

Your summary/reflection:

Interpret the model. a three-part model with black right-arrows between the parts. left part: a large green apple-shaped component with a w-shaped indentation centered on top. a small blue apple-slice shape sits above the left indentation and an arrow points from the shape to the indentation. a small purple apple-slice shape and arrow sit above the right indentation and an arrow points from the shape to the indentation. middle part: a large green apple-shaped component with a square indentation centered on top. sitting in the left side of the indentation is a blue apple-slice shape with a flat bottom, fused to a purple apple-slice shape with a flat bottom on the right side of the indentation. right part: a large green apple-shaped component with a w-shaped indentation centered on top. an up-arrow is centered above the indentation pointing to a fused blue and purple apple-slice-shaped flat-bottom component sitting above the indentation. assigne "true" or "false" to the end of each statement. the model shows a shape change occurring in the enzyme after the substrate is bound in the active site. t/fthere are two products in this model. t? f there are three substrates in this model. t/f the model shows two different enzymes. t/f

Adoença vitiligo afeta qual doença do corpo?

Which body region are part of the cephalic region?