Transcript 7B Warm-Up Monday, November 10, 2008 #25

7B Warm-Up
Monday, March 16, 2009
#21
1. What is the most common birth weight?
about 7 lb
2. At which birth weight is an infant most likely to survive?
about 7 lb
3. How do the principles of natural selection help explain why there are more
deaths among babies whose birth weights are low than among babies whose birth
weights are average?
The infants who are best adapted to survive birth are those that weigh
about 7 lb at birth.
7B Warm-Up
Tuesday, March 17, 2009
#22
Adaptation - a characteristic that improves an individual's ability to survive and
reproduce in a particular environment
Species - a group of organisms that are closely related and can mate to produce
fertile offspring
the process in which inherited characteristics within a population
Evolution - change over generations such that new species sometimes arise
Fossil -
the trace or remains of an organism that lived long ago, most commonly
preserved in sedimentary rock
Fossil record - the history of life in the geologic past as indicated by the traces
or remains of living things
7B Warm-Up
Wednesday, March 18, 2009
#23
Fossils
are commonly
Fossils are commonly
found
in.found in S7L5.c
a. sedimentary rock
b. all kinds of rock.
c. granite.
d. loose sand.
7B Warm-Up
Thursday,
March 19, 2009
#24
Nucleotides are identical except for the base. Name
the four bases.
1. Adenine
2. Thymine
3. Guanine
4. Cytosine
7B Warm-Up
Friday, March 20, 2009
#25
DNA is made of subunits called:
nucleotides