What is a disadvantage of sexual reproduction?
a. Sexual reproduction generates less genetic diversity than asexual reproduction.
b. Sexual reproduction decreases the chance that offspring may be able to live and reproduce in diverse
environments.
c. Sexual reproduction decreases the chance that, in a changing environment, at least some offspring will grow
and reproduce successfully.
d. Sexual reproduction produces fewer offspring per parent than asexual reproduction.
e. On average, sexual reproduction generates unequal numbers of males and females.
ANSWER: d
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The complete replacement of one type of organ with another is called
a. homeotic gene replacement d. modularity b. evo-devo e. punctuated equilibrium c. homoeosis
Once ATP donates its phosphate to a coupled reaction it becomes ADP. The ADP
A. can be recharged in an exergonic reaction to form ATP. B. becomes the needed potential energy source for another coupled reaction. C. is a waste product that must be broken down. D. can be recharged in an oxidation reaction to form ATP. E. can be recharged in an endergonic reaction to form ATP.
At the beginning of this century there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes
Many people were surprised that the number of protein-coding sequences was much smaller than they had expected. Which of the following could account for much of the DNA that is not coding for proteins? A) DNA that consists of histone coding sequences B) DNA that is translated directly without being transcribed C) non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function D) non-protein-coding DNA that serves as binding sites for reverse transcriptase
Changes in tool-kit gene expression (i.e. Hox genes) has been important in what events?
A. The diversification of body plans in arthropods. B. The development of the vertebrate jaw. C. The diversification of mollusk body plans. D. All of the above.