Biology trimester.

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Cell functions are guided by specific DNA sequences. What would be the most direct consequence of changes in the DNA sequences?

Changes in an enzymes performance

Which pair of molecules correctly lists the nucleic acids?

DNA and RNA

Which of the following best explains why different genera or species can still be alike?

Different genera share the same DNA molecules but different nucleic acid sequences

Which statement is an accurate description of genes?

Genes are made of DNA and code for proteins.

Who is at the bottom of the ecosystem pyramid Ecosystem pyramid?

Prodecers

Scientists recently discovered that three different types of squid, a marine animal, previously thought to be three different species, were actually all members of one species. Their earlier ideas were based on using squid carcasses (dead bodies). The new, more accepted classi cation is most probably based on an analysis of

The dna present in the cells of squids.

Increased concern over the number of heat-related illnesses among football players has led to a possible change in uniform design. Shoulder pads were designed that constantly blew cool, dry air underneath the shoulder pads. Tests showed that the use of the device during rest and recovery periods resulted in a reduction of body temperature and heart rate. This new device would help the athlete to

maintain homeostasis


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