Which of the following is probably the genetic basis for new and complex structures in plants?
a. gene duplication d. extinction
b. asexual reproduction e. gene splicing
c. genes that code for flower development
A
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Numerous hypotheses have been proposed for the mass extinction of about 60% of all species, including nearly all the dinosaurs, about 65 million years ago. Evidence has been found of the impact of a large meteor at about the time of this mass extinction. The amount of dust and debris put into the atmosphere upon impact, as well as atmospheric heating, would have been enormous. Using your knowledge of photosynthesis, speculate about why the dinosaurs subsequently became extinct.
What will be an ideal response?
When constructing a karyotype, the chromosome images are arranged in pairs according to ____________________ and ____________________
a. size; telomere location b. size; centromere location c. banding pattern; centromere location d. banding pattern; telomere location e. size; banding pattern
when two hydrogen atoms are added to pyruvate, _______ is produced
Fill in the blank(s) with the appropriate word(s).
All sexually transmitted diseases can be cured if medical treatment is sought early enough
Indicate whether the statement is true or false