What was Lamarck's idea about how organisms changed?
A) He proposed that body parts changed as a result of extra use or disuse.
B) He proposed that variations in populations were selected by the environment.
C) He proposed that all organisms were unchanging over time.
D) He proposed that humans evolved from fish.
A
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DDT and PCBs are no longer legally used anywhere in the U.S
Indicate whether the statement is true or false
The major challenge in using adult DNA in the
cloning process is a. purifying the DNA. b. inserting the DNA into cells. c. reprogramming it to function like the DNA of an egg d. turning off unnecessary genes. e. determining what DNA is best to use.
Which of the following is (are) a factor(s)
determining community structure? a. species interactions b. species adaptations c. climate and topography d. seasonal resource availability e. all of these
What explains why even close relatives have a varied mix of genetic traits?
a. heterozygous b. allele variation c. co-dominance d. independent assortment e. continuous variation